Merging upstream version 127.0.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

133 files changed, 1667 insertions, 66 deletions

diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-long-en.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-long-en.js
index 13b8f374b3..0e6761b04a 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-long-en.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-long-en.js
@@ -5,7 +5,7 @@
 esid: sec-createdatetimeformat
 description: Checks basic handling of dayPeriod, long format.
 features: [Intl.DateTimeFormat-dayPeriod]
-locale: [en-US]
+locale: [en]
 ---*/
 
 const d0000 = new Date(2017, 11, 12,  0, 0, 0, 0);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-narrow-en.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-narrow-en.js
index 4d26a5131d..986ff1f157 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-narrow-en.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-narrow-en.js
@@ -5,7 +5,7 @@
 esid: sec-createdatetimeformat
 description: Checks basic handling of dayPeriod, narrow format.
 features: [Intl.DateTimeFormat-dayPeriod]
-locale: [en-US]
+locale: [en]
 ---*/
 
 const d0000 = new Date(2017, 11, 12,  0, 0, 0, 0);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-short-en.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-short-en.js
index f7b410f24d..dec193c396 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-short-en.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/dayPeriod-short-en.js
@@ -5,7 +5,7 @@
 esid: sec-initializedatetimeformat
 description: Checks basic handling of dayPeriod, short format.
 features: [Intl.DateTimeFormat-dayPeriod]
-locale: [en-US]
+locale: [en]
 ---*/
 
 const d0000 = new Date(2017, 11, 12,  0, 0, 0, 0);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
index 25af5ada6d..49218a3b39 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/format/fractionalSecondDigits.js
@@ -5,7 +5,7 @@
 esid: sec-createdatetimeformat
 description: Checks basic handling of fractionalSecondDigits.
 features: [Intl.DateTimeFormat-fractionalSecondDigits]
-locale: [en-US]
+locale: [en]
 ---*/
 
 const d1 = new Date(2019, 7, 10,  1, 2, 3, 234);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatToParts/fractionalSecondDigits.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatToParts/fractionalSecondDigits.js
index 543dfb2274..046084493c 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatToParts/fractionalSecondDigits.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/formatToParts/fractionalSecondDigits.js
@@ -5,7 +5,7 @@
 esid: sec-createdatetimeformat
 description: Checks basic handling of fractionalSecondDigits.
 features: [Intl.DateTimeFormat-fractionalSecondDigits]
-locale: [en-US]
+locale: [en]
 ---*/
 
 const d1 = new Date(2019, 7, 10,  1, 2, 3, 234);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/prototype/resolvedOptions/hourCycle-default.js b/js/src/tests/test262/intl402/DateTimeFormat/prototype/resolvedOptions/hourCycle-default.js
index 9063e045a6..c2cccd826c 100644
--- a/js/src/tests/test262/intl402/DateTimeFormat/prototype/resolvedOptions/hourCycle-default.js
+++ b/js/src/tests/test262/intl402/DateTimeFormat/prototype/resolvedOptions/hourCycle-default.js
@@ -21,27 +21,35 @@ info: |
         c. If hc is null, set hc to dataLocaleData.[[hourCycle]].
   27. Set dateTimeFormat.[[HourCycle]] to hc.
 
-locale: [en, fr, it, ja, zh, ko, ar, hi, en-u-hc-h24]
+locale: [en, fr, it, ja, zh, ko, ar, hi]
 ---*/
 
-let locales = ["en", "fr", "it", "ja", "ja-u-hc-h11", "zh", "ko", "ar", "hi", "en-u-hc-h24"];
+let locales = ["en", "fr", "it", "ja", "zh", "ko", "ar", "hi"];
 
-locales.forEach(function(locale) {
-  let hcDefault = new Intl.DateTimeFormat(locale, { hour: "numeric" }).resolvedOptions().hourCycle;
-  if (hcDefault === "h11" || hcDefault === "h12") {
-    assert.sameValue(new Intl.DateTimeFormat(locale, { hour: "numeric", hour12: true }).resolvedOptions().hourCycle, hcDefault);
+for (let locale of locales) {
+  let hcDefault = new Intl.DateTimeFormat(locale, {hour: "numeric"}).resolvedOptions().hourCycle;
+  assert(
+    hcDefault === "h11" || hcDefault === "h12" || hcDefault === "h23" || hcDefault === "h24",
+    "hcDefault is one of [h11, h12, h23, h24]"
+  );
 
-    // no locale has "h24" as a default. see https://github.com/tc39/ecma402/pull/758#issue-1622377292
-    assert.sameValue(new Intl.DateTimeFormat(locale, { hour: "numeric", hour12: false }).resolvedOptions().hourCycle, "h23");
-  }
+  let hour12 = new Intl.DateTimeFormat(locale, {hour: "numeric", hour12: true}).resolvedOptions().hourCycle;
+  assert(hour12 === "h11" || hour12 === "h12", "hour12 is one of [h11, h12]");
+
+  let hour24 = new Intl.DateTimeFormat(locale, {hour: "numeric", hour12: false}).resolvedOptions().hourCycle;
+  assert(hour24 === "h23" || hour24 === "h24", "hour24 is one of [h23, h24]");
 
-  // however, "h24" can be set via locale extension.
-  if (hcDefault === "h23" || hcDefault === "h24") {
-    assert.sameValue(new Intl.DateTimeFormat(locale, { hour: "numeric", hour12: false }).resolvedOptions().hourCycle, hcDefault);
+  if (hcDefault === "h11" || hcDefault === "h12") {
+    assert.sameValue(hour12, hcDefault, "hour12 matches hcDefault");
+  } else {
+    assert.sameValue(hour24, hcDefault, "hour24 matches hcDefault");
   }
 
-  let hcHour12 = new Intl.DateTimeFormat(locale, { hour: "numeric", hour12: true }).resolvedOptions().hourCycle;
-  assert(hcHour12 === "h11" || hcHour12 === "h12", "Expected `hourCycle`: " + hcHour12 + " to be in [\"h11\", \"h12\"]");
-});
+  // 24-hour clock uses the "h23" format in all locales.
+  assert.sameValue(hour24, "h23");
+
+  // 12-hour clock uses the "h12" format in all locales except "ja".
+  assert.sameValue(hour12, locale === "ja" ? "h11" : "h12");
+}
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DateTimeFormat/timezone-legacy-non-iana.js b/js/src/tests/test262/intl402/DateTimeFormat/timezone-legacy-non-iana.js
new file mode 100644
index 0000000000..d99cf18df4
--- /dev/null
+++ b/js/src/tests/test262/intl402/DateTimeFormat/timezone-legacy-non-iana.js
@@ -0,0 +1,45 @@
+// Copyright (C) 2024 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-initializedatetimeformat
+description: Only IANA time zone identifiers are allowed.
+---*/
+
+// List of non-IANA link names, copied from:
+// https://github.com/unicode-org/icu/blob/main/icu4c/source/tools/tzcode/icuzones
+const invalidTimeZones = [
+  "ACT",
+  "AET",
+  "AGT",
+  "ART",
+  "AST",
+  "BET",
+  "BST",
+  "CAT",
+  "CNT",
+  "CST",
+  "CTT",
+  "EAT",
+  "ECT",
+  "IET",
+  "IST",
+  "JST",
+  "MIT",
+  "NET",
+  "NST",
+  "PLT",
+  "PNT",
+  "PRT",
+  "PST",
+  "SST",
+  "VST",
+];
+
+for (let timeZone of invalidTimeZones) {
+  assert.throws(RangeError, () => {
+    new Intl.DateTimeFormat(undefined, {timeZone});
+  }, "Time zone: " + timeZone);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DisplayNames/prototype/of/type-region-invalid.js b/js/src/tests/test262/intl402/DisplayNames/prototype/of/type-region-invalid.js
index 0fcce4ac7e..3c5608d162 100644
--- a/js/src/tests/test262/intl402/DisplayNames/prototype/of/type-region-invalid.js
+++ b/js/src/tests/test262/intl402/DisplayNames/prototype/of/type-region-invalid.js
@@ -14,7 +14,7 @@ features: [Intl.DisplayNames]
 ---*/
 
 // https://unicode.org/reports/tr35/#unicode_region_subtag
-// unicode_region_subtag	= (alpha{2} | digit{3}) ;
+// unicode_region_subtag = (alpha{2} | digit{3}) ;
 
 var displayNames = new Intl.DisplayNames(undefined, {type: 'region'});
 
diff --git a/js/src/tests/test262/intl402/DurationFormat/constructor-unit-style-defaults.js b/js/src/tests/test262/intl402/DurationFormat/constructor-unit-style-defaults.js
new file mode 100644
index 0000000000..93f54dcab4
--- /dev/null
+++ b/js/src/tests/test262/intl402/DurationFormat/constructor-unit-style-defaults.js
@@ -0,0 +1,34 @@
+// |reftest| skip -- Intl.DurationFormat is not supported
+// Copyright 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat
+description: Verifies that default style settings for units following units with "numeric" or "2-digit" style are honored.
+info: |
+    GetDurationUnitOptions (unit, options, baseStyle, stylesList, digitalBase, prevStyle)
+      (...)
+      3. If style is undefined, then
+        (...)
+        i. If prevStyle is "fractional", "numeric" or "2-digit", then
+          (...)
+          2. Set style to "numeric".
+      (...)
+      9. If prevStyle is "numeric" or "2-digit", then
+        (...)
+        b. If unit is "minutes" or "seconds", then
+                i. Set style to "2-digit".
+features: [Intl.DurationFormat]
+---*/
+
+for (const numericLikeStyle of ["numeric", "2-digit"]){
+  var opts = new Intl.DurationFormat([], {hours: numericLikeStyle}).resolvedOptions();
+
+  assert.sameValue(opts.minutes, "2-digit", `minutes default value should be '2-digit' when following any ${numericLikeStyle}-styled unit`);
+  assert.sameValue(opts.seconds, "2-digit", `seconds default value should be '2-digit' when following any ${numericLikeStyle}-styled unit`);
+  assert.sameValue(opts.milliseconds, "numeric", `milliseconds default value should be 'numeric' when following any ${numericLikeStyle}-styled unit`);
+  assert.sameValue(opts.microseconds, "numeric", `microseconds default value should be 'numeric' when following any ${numericLikeStyle}-styled unit`);
+  assert.sameValue(opts.nanoseconds, "numeric", `nanoseconds default value should be 'numeric' when following any ${numericLikeStyle}-styled unit`);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/fractions-of-subsecond-units-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/fractions-of-subsecond-units-en.js
new file mode 100644
index 0000000000..342fa613cf
--- /dev/null
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/fractions-of-subsecond-units-en.js
@@ -0,0 +1,65 @@
+// |reftest| skip -- Intl.DurationFormat is not supported
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat.prototype.format
+description: Checks that fractional milliseconds and microseconds are formatted correctly when microseconds or nanoseconds are the first units with "numeric" style.
+info: |
+    PartitionDurationFormatPattern ( durationFormat, duration )
+    (...)
+    9.
+      (...)
+      g. If unit is "seconds", "milliseconds", or "microseconds", then
+        i. If unit is "seconds", then
+            1. Let nextStyle be durationFormat.[[MillisecondsStyle]].
+        ii. Else if unit is "milliseconds", then
+            1. Let nextStyle be durationFormat.[[MicrosecondsStyle]].
+        iii. Else,
+            1. Let nextStyle be durationFormat.[[NanosecondsStyle]].
+        iv. If nextStyle is "fractional", then
+            1. Set value to value + AddFractionalDigits(durationFormat, duration).
+            2. If durationFormat.[[FractionalDigits]] is undefined, then
+                a. Let maximumFractionDigits be 9𝔽.
+                b. Let minimumFractionDigits be +0𝔽.
+            3. Else,
+                a. Let maximumFractionDigits be 𝔽(durationFormat.[[FractionalDigits]]).
+                b. Let minimumFractionDigits be 𝔽(durationFormat.[[FractionalDigits]]).
+            4. Perform ! CreateDataPropertyOrThrow(nfOpts, "maximumFractionDigits", maximumFractionDigits ).
+            5. Perform ! CreateDataPropertyOrThrow(nfOpts, "minimumFractionDigits", minimumFractionDigits ).
+            6. Perform ! CreateDataPropertyOrThrow(nfOpts, "roundingMode", "trunc").
+            7. Set done to true.
+
+locale: [en]
+features: [Intl.DurationFormat]
+---*/
+
+
+const locale = "en";
+const decimalSeparator = ".";
+
+let d = {seconds: 3, milliseconds: 444, microseconds: 55, nanoseconds: 6};
+let dfOpts = {microseconds: "numeric"};
+
+let expectedList = [];
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "second", unitDisplay: "short"}).format(d.seconds));
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "millisecond", unitDisplay: "short", minimumFractionDigits:0, maximumFractionDigits: 9}).format(d.milliseconds.toString() + decimalSeparator + d.microseconds.toString().padStart(3, '0') + d.nanoseconds.toString().padStart(3, '0')));
+
+let expected = new Intl.ListFormat(locale, {style: "short"}).format(expectedList);
+let actual = new Intl.DurationFormat(locale, dfOpts).format(d);
+
+// assert.sameValue(actual, expected, `DurationFormat output when microseconds first "numeric" unit`);
+
+dfOpts = {nanoseconds: "numeric"};
+expectedList = [];
+
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "second", unitDisplay: "short"}).format(d.seconds));
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "millisecond", unitDisplay: "short"}).format(d.milliseconds));
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "microsecond", unitDisplay: "short", minimumFractionDigits:0, maximumFractionDigits: 9}).format(d.microseconds.toString() + decimalSeparator + d.nanoseconds.toString().padStart(3, '0')));
+
+expected = new Intl.ListFormat(locale, {style: "short"}).format(expectedList);
+actual = new Intl.DurationFormat(locale, dfOpts).format(d);
+
+assert.sameValue(actual, expected, `DurationFormat output when nanoseconds first "numeric" unit`);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-non-numeric-styles-es.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-non-numeric-styles-es.js
new file mode 100644
index 0000000000..33ec1a2776
--- /dev/null
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-non-numeric-styles-es.js
@@ -0,0 +1,88 @@
+// |reftest| skip -- Intl.DurationFormat is not supported
+// Copyright 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat.prototype.format
+description: Test if format method formats duration correctly with mixed non-numeric settings for unit styles. Compares output from format method to output produced through using NumberFormat and ListFormat as used by DurationFormat.
+info: |
+  PartitionDurationFormatPattern ( durationFormat, duration )
+  ...
+  9. While done is false, repeat for each row in Table 2 in table order, except the header row:
+    ...
+    k. If value is not 0 or display is not "auto" or displayRequired is "true", then
+      ...
+      v. If style is not "fractional", "numeric", or "2-digit", then
+        1. Perform ! CreateDataPropertyOrThrow(nfOpts, "style", "unit").
+        2. Perform ! CreateDataPropertyOrThrow(nfOpts, "unit", numberFormatUnit).
+        3. Perform ! CreateDataPropertyOrThrow(nfOpts, "unitDisplay", style).
+      ...
+      ix. Let parts be ! PartitionNumberPattern(nf, value).
+  ...
+  14. Perform ! CreateDataPropertyOrThrow(lfOpts, "style", listStyle).
+  15. Let lf be ! Construct(%ListFormat%, « durationFormat.[[Locale]], lfOpts »).
+  ...
+  18. Let formatted be CreatePartsFromList(lf, strings).
+
+locale: [es]
+features: [Intl.DurationFormat]
+---*/
+
+function formatDuration(locale, duration, dfOpts){
+  let result = [];
+  for (const unit in duration){
+    let nfUnit = unit.substring(0, unit.length - 1);
+    let nf = new Intl.NumberFormat(locale, {style: "unit", unit: nfUnit, unitDisplay: dfOpts[unit]});
+    result.push(nf.format(duration[unit]));
+  }
+
+  for (const baseStyle of ["long", "short", "narrow"]){
+    let lf = new Intl.ListFormat(locale, {type: "unit", style: baseStyle});
+    let expected = lf.format(result);
+    dfOpts.style = baseStyle;
+    let df = new Intl.DurationFormat(locale, dfOpts);
+    let actual = df.format(duration);
+    assert.sameValue(actual, expected);
+  }
+}
+
+const duration = {
+  years: 1,
+  months: 2,
+  weeks: 3,
+  days: 0,
+  hours: 4,
+  minutes: 5,
+  seconds: 6,
+  milliseconds: 7,
+  microseconds: 8,
+  nanoseconds: 9,
+};
+
+const locale = "es";
+
+formatDuration(locale, duration, {
+  years: "narrow",
+  months: "narrow",
+  weeks: "narrow",
+  days: "short",
+  hours: "short",
+  minutes: "short",
+  seconds: "long",
+  milliseconds: "long",
+  microseconds: "long",
+  nanoseconds: "narrow", });
+
+formatDuration(locale, duration, {
+  years: "long",
+  months: "short",
+  weeks: "narrow",
+  days: "long",
+  hours: "short",
+  minutes: "narrow",
+  seconds: "long",
+  milliseconds: "short",
+  microseconds: "narrow",
+  nanoseconds: "long", });
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-short-and-numeric.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-short-and-numeric.js
new file mode 100644
index 0000000000..19adbfbd47
--- /dev/null
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/mixed-short-and-numeric.js
@@ -0,0 +1,37 @@
+// |reftest| skip -- Intl.DurationFormat is not supported
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-Intl.DurationFormat.prototype.format
+description: Checks that durations containing a mixture of numericlike and non-numericlike styles are formatted using the "short" style when DurationFormat base style is *undefined*.
+info: |
+    PartitionDurationFormatPattern ( durationFormat, duration )
+
+      12. Let listStyle be durationFormat.[[Style]].
+      (...)
+      14. Perform ! CreateDataPropertyOrThrow(lfOpts, "style", listStyle).
+
+locale: [en]
+features: [Intl.DurationFormat]
+---*/
+
+const locale = "en";
+const timeSeparator = ":";
+
+
+let d = {days: 5, hours: 1, minutes: 2, seconds: 3};
+let dfOpts = {minutes: "numeric", seconds: "numeric"};
+
+let expectedList = [];
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "day", unitDisplay: "short"}).format(d.days));
+expectedList.push(new Intl.NumberFormat(locale, {style: "unit", unit: "hour", unitDisplay: "short"}).format(d.hours));
+expectedList.push(new Intl.NumberFormat(locale).format(d.minutes) + timeSeparator + new Intl.NumberFormat(locale, {minimumIntegerDigits: 2}).format(d.seconds));
+
+let expected = new Intl.ListFormat(locale, {style: "short"}).format(expectedList);
+let actual = new Intl.DurationFormat(locale, dfOpts).format(d);
+
+assert.sameValue(actual, expected);
+
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-default-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-default-en.js
index c6b58a5dfc..3c0f1d6dd5 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-default-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-default-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
   Test format method with negative duration and default style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-short-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-short-en.js
index 83eb5b4639..9ebf996341 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-short-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-duration-style-short-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
   Test format method with negative duration and "short" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-digital-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-digital-en.js
index c9f119c368..e26f198cd5 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-digital-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-digital-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
   Test format method with negative duration and "digital" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-long-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-long-en.js
index fe074d488e..d7654f5630 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-long-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-long-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
   Test format method with negative duration and "long" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-narrow-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-narrow-en.js
index 4d1db5dc67..1735112336 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-narrow-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/negative-durationstyle-narrow-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
   Test format method with negative duration and "narrow" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/numeric-hour-with-zero-minutes-and-non-zero-seconds.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/numeric-hour-with-zero-minutes-and-non-zero-seconds.js
index dc5ad4ea84..3c37afa1b4 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/numeric-hour-with-zero-minutes-and-non-zero-seconds.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/numeric-hour-with-zero-minutes-and-non-zero-seconds.js
@@ -5,8 +5,8 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: >
-  The correct separator is used for numeric hours with zero minutes and non-zero seconds.
-locale: [en-US]
+  Minutes with numeric or 2-digit style are included in the output when between displayed hours and seconds, even when the minutes value is zero.
+locale: [en]
 features: [Intl.DurationFormat]
 ---*/
 
@@ -15,30 +15,18 @@ const df = new Intl.DurationFormat("en", {
   hours: "numeric",
 });
 
-const lf = new Intl.ListFormat("en", {
-  type: "unit",
-  style: "short",
-});
-
 const duration = {
   hours: 1,
-
-  // Minutes is omitted from the output when its value is zero.
   minutes: 0,
-
-  // Either seconds or sub-seconds must be non-zero.
   seconds: 3,
 };
 
-const expected = lf.format([
-  new Intl.NumberFormat("en", {minimumIntegerDigits: 1}).format(duration.hours),
-  new Intl.NumberFormat("en", {minimumIntegerDigits: 2}).format(duration.seconds),
-]);
+const expected = "1:00:03"
 
 assert.sameValue(
   df.format(duration),
   expected,
-  `No time separator is used when minutes is zero`
+  `Minutes always displayed when between displayed hours and seconds, even if minutes is 0`
 );
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/precision-exact-mathematical-values.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/precision-exact-mathematical-values.js
index 5518450d6a..dbb34d39f7 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/precision-exact-mathematical-values.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/precision-exact-mathematical-values.js
@@ -25,7 +25,7 @@ info: |
         7. Let parts be ! PartitionNumberPattern(nf, value).
         ...
 
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-default-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-default-en.js
index 6eb5c4999e..dae05ae5f1 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-default-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-default-en.js
@@ -5,7 +5,7 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: Test if format method formats duration correctly with different "style" arguments
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-en.js
index 4f34d50aa9..cc2dd3342f 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-en.js
@@ -6,7 +6,7 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: Test if format method formats duration correctly with different "style" arguments
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-en.js
index d75f51b14a..60c2232d6a 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-en.js
@@ -14,6 +14,7 @@ info: |
   5. Else,
     a. Perform ! CreateDataPropertyOrThrow(nfOpts, "maximumFractionDigits", durationFormat.[[FractionalDigits]]).
     b. Perform ! CreateDataPropertyOrThrow(nfOpts, "minimumFractionDigits", durationFormat.[[FractionalDigits]]).
+locale: [en]
 features: [Intl.DurationFormat]
 ---*/
 
@@ -28,12 +29,12 @@ const duration = {
 
 
 const style = "digital";
-const df = new Intl.DurationFormat(undefined, {style, fractionalDigits: 0});
-const dfMilli = new Intl.DurationFormat(undefined, {style, fractionalDigits: 3});
-const dfFourDigits = new Intl.DurationFormat(undefined, {style, fractionalDigits: 4});
-const dfMicro = new Intl.DurationFormat(undefined, {style, fractionalDigits: 6});
-const dfEightDigits = new Intl.DurationFormat(undefined, {style, fractionalDigits: 8});
-const dfNano = new Intl.DurationFormat(undefined, {style, fractionalDigits: 9});
+const df = new Intl.DurationFormat("en", {style, fractionalDigits: 0});
+const dfMilli = new Intl.DurationFormat("en", {style, fractionalDigits: 3});
+const dfFourDigits = new Intl.DurationFormat("en", {style, fractionalDigits: 4});
+const dfMicro = new Intl.DurationFormat("en", {style, fractionalDigits: 6});
+const dfEightDigits = new Intl.DurationFormat("en", {style, fractionalDigits: 8});
+const dfNano = new Intl.DurationFormat("en", {style, fractionalDigits: 9});
 
 assert.sameValue(df.format(duration), "1:22:33", `format output without sub-second digits using ${style} style option`);
 
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-undefined.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-undefined-en.js
index 631e6c36eb..b297c0c7ba 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-undefined.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-digital-fractionalDigits-undefined-en.js
@@ -14,6 +14,7 @@ info: |
   5. Else,
     a. Perform ! CreateDataPropertyOrThrow(nfOpts, "maximumFractionDigits", durationFormat.[[FractionalDigits]]).
     b. Perform ! CreateDataPropertyOrThrow(nfOpts, "minimumFractionDigits", durationFormat.[[FractionalDigits]]).
+locale: [en]
 features: [Intl.DurationFormat]
 ---*/
 
@@ -35,7 +36,7 @@ const durationMicro = {
   microseconds: 222
 };
 
-const durationMill = {
+const durationMilli = {
   hours: 1,
   minutes: 22,
   seconds: 33,
@@ -48,6 +49,14 @@ const durationNoSubsecond = {
   seconds: 33
 };
 
+const durationFiveFractional = {
+  hours: 2,
+  minutes: 30,
+  seconds: 10,
+  milliseconds: 111,
+  microseconds: 220,
+};
+
 const durationSevenFractional = {
   hours: 2,
   minutes: 30,
@@ -58,14 +67,14 @@ const durationSevenFractional = {
 };
 
 const style = "digital";
-const df = new Intl.DurationFormat(undefined, {style, fractionalDigits: undefined});
+const df = new Intl.DurationFormat("en", {style, fractionalDigits: undefined});
 
 assert.sameValue(df.format(durationNano), "1:22:33.111222333", `format output with nanosecond digits and fractionalDigits: undefined using ${style} style option`);
 assert.sameValue(df.format(durationMicro), "1:22:33.111222", `format output with microsecond digits and fractionalDigits: undefined using ${style} style option`);
 assert.sameValue(df.format(durationMilli), "1:22:33.111", `format output with millisecond digits and fractionalDigits: undefined using ${style} style option`);
 assert.sameValue(df.format(durationNoSubsecond), "1:22:33", `format output with no subsecond digits and fractionalDigits: undefined using ${style} style option`);
 
-assert.sameValue(df.format(durationFiveFractional), "2:30:11122", `format output with five subsecond digits and fractionalDigits: undefined using ${style} style option`);
-assert.sameValue(df.format(durationSevenFractional), "2:30:1112203", `format output with seven subsecond digits and fractionalDigits: undefined using ${style} style option`);
+assert.sameValue(df.format(durationFiveFractional), "2:30:10.11122", `format output with five subsecond digits and fractionalDigits: undefined using ${style} style option`);
+assert.sameValue(df.format(durationSevenFractional), "2:30:10.1112203", `format output with seven subsecond digits and fractionalDigits: undefined using ${style} style option`);
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-long-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-long-en.js
index d9e6fc6cbb..74524da674 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-long-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-long-en.js
@@ -5,7 +5,7 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: Test if format method formats duration correctly with different "style" arguments
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-narrow-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-narrow-en.js
index 66b2258761..e75dc17170 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-narrow-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-narrow-en.js
@@ -5,7 +5,7 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: Test if format method formats duration correctly with different "style" arguments
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-short-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-short-en.js
index 2a66c01b06..049e034681 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-short-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/format/style-short-en.js
@@ -5,7 +5,7 @@
 /*---
 esid: sec-Intl.DurationFormat.prototype.format
 description: Test if format method formats duration correctly with different "style" arguments
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-default-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-default-en.js
index bfc182c34b..5ce6300268 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-default-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-default-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.formatToParts
 description: >
   Test formatToParts method with negative duration and default style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-digital-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-digital-en.js
index 52a40072ba..6978739ac3 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-digital-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-digital-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.formatToParts
 description: >
   Test formatToParts method with negative duration and "digital" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-long-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-long-en.js
index 3756db8a84..638f5922f1 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-long-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-long-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.formatToParts
 description: >
   Test formatToParts method with negative duration and "long" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-narrow-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-narrow-en.js
index a9717ce67a..b138100f8a 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-narrow-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-narrow-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.formatToParts
 description: >
   Test formatToParts method with negative duration and "narrow" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-short-en.js b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-short-en.js
index bc2ed69c5b..76ce8ccbf1 100644
--- a/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-short-en.js
+++ b/js/src/tests/test262/intl402/DurationFormat/prototype/formatToParts/negative-duration-formatToParts-style-short-en.js
@@ -6,7 +6,7 @@
 esid: sec-Intl.DurationFormat.prototype.formatToParts
 description: >
   Test formatToParts method with negative duration and "short" style
-locale: [en-US]
+locale: [en]
 includes: [testIntl.js]
 features: [Intl.DurationFormat]
 ---*/
diff --git a/js/src/tests/test262/intl402/Locale/constructor-options-collation-invalid.js b/js/src/tests/test262/intl402/Locale/constructor-options-collation-invalid.js
index d256093257..10f5cd5e4a 100644
--- a/js/src/tests/test262/intl402/Locale/constructor-options-collation-invalid.js
+++ b/js/src/tests/test262/intl402/Locale/constructor-options-collation-invalid.js
@@ -30,7 +30,7 @@ const invalidCollationOptions = [
 for (const invalidCollationOption of invalidCollationOptions) {
   assert.throws(RangeError, function() {
     new Intl.Locale("en", {collation: invalidCollationOption});
-  }, '`new Intl.Locale("en", {collation: invalidCollationOption})` throws RangeError');
+  });
 }
 
 reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Locale/prototype/calendar/canonicalize.js b/js/src/tests/test262/intl402/Locale/prototype/calendar/canonicalize.js
new file mode 100644
index 0000000000..5ade4fe795
--- /dev/null
+++ b/js/src/tests/test262/intl402/Locale/prototype/calendar/canonicalize.js
@@ -0,0 +1,22 @@
+// Copyright 2024 Google Inc.  All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-apply-unicode-extension-to-tag
+description: Checks canonicalize value of extension in ApplyUnicodeExtensionToTag.
+info: |
+    ApplyUnicodeExtensionToTag
+     1. Let _optionsUValue_ be the ASCII-lowercase of _optionsValue_.
+     1. Set _value_ to the String value resulting from canonicalizing _optionsUValue_ as a value of key _key_ per <a href="https://unicode.org/reports/tr35/#processing-localeids">Unicode Technical Standard #35 Part 1 Core, Annex C LocaleId Canonicalization Section 5 Canonicalizing Syntax, Processing LocaleIds</a>.
+features: [Intl.Locale]
+---*/
+
+const loc = new Intl.Locale('en', {calendar: 'islamicc'});
+
+assert.sameValue(loc.toString(), "en-u-ca-islamic-civil",
+    "'islamicc' should be canonicalize to 'islamic-civil'");
+
+assert.sameValue(loc.calendar, "islamic-civil",
+    "'islamicc' should be canonicalize to 'islamic-civil'");
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateAdd/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateAdd/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateAdd/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateAdd/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateFromFields/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateFromFields/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateFromFields/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateFromFields/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateUntil/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateUntil/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateUntil/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dateUntil/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/day/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/day/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/day/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/day/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfWeek/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfWeek/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfWeek/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfWeek/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/dayOfYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInMonth/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInMonth/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInMonth/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInMonth/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInWeek/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInWeek/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInWeek/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInWeek/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/daysInYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-iso-string.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-iso-string.js
new file mode 100644
index 0000000000..2772960abe
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-iso-string.js
@@ -0,0 +1,28 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.era
+description: An ISO 8601 string can be converted to a calendar ID in Calendar
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+
+for (const calendar of [
+  "2020-01-01",
+  "2020-01-01[u-ca=iso8601]",
+  "2020-01-01T00:00:00.000000000",
+  "2020-01-01T00:00:00.000000000[u-ca=iso8601]",
+  "01-01",
+  "01-01[u-ca=iso8601]",
+  "2020-01",
+  "2020-01[u-ca=iso8601]",
+]) {
+  const arg = { year: 1976, monthCode: "M11", day: 18, calendar };
+  const result = instance.era(arg);
+  assert.sameValue(result, undefined, `Calendar created from string "${calendar}"`);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-year-zero.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-year-zero.js
index d0698c070c..57df6364f9 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-year-zero.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-propertybag-calendar-year-zero.js
@@ -16,7 +16,8 @@ const invalidStrings = [
   "-000000-10-31T17:45+00:00[UTC]",
 ];
 const instance = new Temporal.Calendar("iso8601");
-invalidStrings.forEach((arg) => {
+invalidStrings.forEach((str) => {
+  const arg = { year: 1976, month: 11, day: 18, calendar: str };
   assert.throws(
     RangeError,
     () => instance.era(arg),
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-string-calendar-annotation-invalid-key.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-string-calendar-annotation-invalid-key.js
new file mode 100644
index 0000000000..f34a405169
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/argument-string-calendar-annotation-invalid-key.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.era
+description: Annotation keys are lowercase-only
+features: [Temporal]
+---*/
+
+const invalidStrings = [
+  ["1970-01-01[U-CA=iso8601]", "invalid capitalized key"],
+  ["1970-01-01[u-CA=iso8601]", "invalid partially-capitalized key"],
+  ["1970-01-01[FOO=bar]", "invalid capitalized unrecognized key"],
+];
+const instance = new Temporal.Calendar("iso8601");
+invalidStrings.forEach(([arg, descr]) => {
+  assert.throws(
+    RangeError,
+    () => instance.era(arg),
+    `annotation keys must be lowercase: ${arg} - ${descr}`
+  );
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/shell.js
index 32df7c4217..63bc783738 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/era/shell.js
@@ -2046,6 +2046,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2133,6 +2136,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-iso-string.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-iso-string.js
new file mode 100644
index 0000000000..2899ea877c
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-iso-string.js
@@ -0,0 +1,28 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.erayear
+description: An ISO 8601 string can be converted to a calendar ID in Calendar
+features: [Temporal]
+---*/
+
+const instance = new Temporal.Calendar("iso8601");
+
+for (const calendar of [
+  "2020-01-01",
+  "2020-01-01[u-ca=iso8601]",
+  "2020-01-01T00:00:00.000000000",
+  "2020-01-01T00:00:00.000000000[u-ca=iso8601]",
+  "01-01",
+  "01-01[u-ca=iso8601]",
+  "2020-01",
+  "2020-01[u-ca=iso8601]",
+]) {
+  const arg = { year: 1976, monthCode: "M11", day: 18, calendar };
+  const result = instance.eraYear(arg);
+  assert.sameValue(result, undefined, `Calendar created from string "${calendar}"`);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-year-zero.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-year-zero.js
index 65675a5894..eaa93d916a 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-year-zero.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-propertybag-calendar-year-zero.js
@@ -16,7 +16,8 @@ const invalidStrings = [
   "-000000-10-31T17:45+00:00[UTC]",
 ];
 const instance = new Temporal.Calendar("iso8601");
-invalidStrings.forEach((arg) => {
+invalidStrings.forEach((str) => {
+  const arg = { year: 1976, month: 11, day: 18, calendar: str };
   assert.throws(
     RangeError,
     () => instance.eraYear(arg),
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-string-calendar-annotation-invalid-key.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-string-calendar-annotation-invalid-key.js
new file mode 100644
index 0000000000..7bec3d6a54
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/argument-string-calendar-annotation-invalid-key.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.erayear
+description: Annotation keys are lowercase-only
+features: [Temporal]
+---*/
+
+const invalidStrings = [
+  ["1970-01-01[U-CA=iso8601]", "invalid capitalized key"],
+  ["1970-01-01[u-CA=iso8601]", "invalid partially-capitalized key"],
+  ["1970-01-01[FOO=bar]", "invalid capitalized unrecognized key"],
+];
+const instance = new Temporal.Calendar("iso8601");
+invalidStrings.forEach(([arg, descr]) => {
+  assert.throws(
+    RangeError,
+    () => instance.eraYear(arg),
+    `annotation keys must be lowercase: ${arg} - ${descr}`
+  );
+});
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/shell.js
index 32df7c4217..63bc783738 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/eraYear/shell.js
@@ -2046,6 +2046,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2133,6 +2136,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/inLeapYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/inLeapYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/inLeapYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/inLeapYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/month/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/month/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/month/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/month/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthCode/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthCode/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthCode/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthCode/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthDayFromFields/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthDayFromFields/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthDayFromFields/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthDayFromFields/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthsInYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthsInYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthsInYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/monthsInYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..3eeb8186ef
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.weekofyear
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = { month: 1, day: 1, year: 2021, calendar};
+
+assert.sameValue(calendar.weekOfYear({...date}), 1);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = { month: 1, day: 1, year: 2021, calendar};
+
+assert.sameValue(calendar.weekOfYear({...isodate}), 53);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/non-iso-week-of-year.js
new file mode 100644
index 0000000000..9392c0c13b
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.weekofyear
+description: >
+  Temporal.Calendar.prototype.weekOfYear returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = { month: 1, day: 1, year: 2024, calendar};
+
+assert.sameValue(calendar.weekOfYear({...date}), 1);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = { month: 1, day: 1, year: 2024, calendar};
+
+assert.sameValue(calendar.weekOfYear({...nonisodate}), undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/weekOfYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/year/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/year/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/year/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/year/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearMonthFromFields/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearMonthFromFields/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearMonthFromFields/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearMonthFromFields/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..ff2d9c0b60
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.yearofweek
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = { month: 1, day: 1, year: 2021, calendar};
+
+assert.sameValue(calendar.yearOfWeek({...date}), 2021);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = { month: 1, day: 1, year: 2021, calendar};
+
+assert.sameValue(calendar.yearOfWeek({...isodate}), 2020);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/non-iso-week-of-year.js
new file mode 100644
index 0000000000..9abf674f0f
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.calendar.prototype.yearofweek
+description: >
+  Temporal.Calendar.prototype.yearOfWeek returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = { month: 1, day: 1, year: 2024, calendar};
+
+assert.sameValue(calendar.yearOfWeek({...date}), 2024);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = { month: 1, day: 1, year: 2024, calendar};
+
+assert.sameValue(calendar.yearOfWeek({...nonisodate}), undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/shell.js b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Calendar/prototype/yearOfWeek/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Duration/prototype/add/shell.js b/js/src/tests/test262/intl402/Temporal/Duration/prototype/add/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Duration/prototype/add/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Duration/prototype/add/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Duration/prototype/round/shell.js b/js/src/tests/test262/intl402/Temporal/Duration/prototype/round/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Duration/prototype/round/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Duration/prototype/round/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Duration/prototype/subtract/shell.js b/js/src/tests/test262/intl402/Temporal/Duration/prototype/subtract/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Duration/prototype/subtract/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Duration/prototype/subtract/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Duration/prototype/total/shell.js b/js/src/tests/test262/intl402/Temporal/Duration/prototype/total/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/Duration/prototype/total/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/Duration/prototype/total/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/Instant/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/Instant/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..2d0614deb9
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/Instant/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,31 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.instant.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const instant = new Temporal.Instant(1711475200_000_000_000n);
+
+assert(
+  instant.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !instant.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+assert(
+  instant.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !instant.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/compare/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/compare/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDate/compare/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/compare/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/from/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/from/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDate/from/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/from/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/equals/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/equals/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/equals/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/equals/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/since/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/since/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/since/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/since/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..0bb42308d5
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const dateGregorian = new Temporal.PlainDate(2024, 3, 26, "gregory");
+
+assert(
+  dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+
+const dateIslamic = new Temporal.PlainDate(2024, 3, 26, "islamic");
+
+assert(
+  dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/until/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/until/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/until/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/until/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/browser.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..312d87afd6
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.weekofyear
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(isodate.weekOfYear, 53);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/non-iso-week-of-year.js
new file mode 100644
index 0000000000..b9717b8eba
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.weekofyear
+description: >
+  Temporal.PlainDate.prototype.weekOfYear returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDate(2024, 1, 1, calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.PlainDate(2024, 1, 1, calendar);
+
+assert.sameValue(nonisodate.weekOfYear, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/weekOfYear/shell.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/browser.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..d8556f309a
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.yearofweek
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(date.yearOfWeek, 2021);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.PlainDate(2021, 1, 1, calendar);
+
+assert.sameValue(isodate.yearOfWeek, 2020);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/non-iso-week-of-year.js
new file mode 100644
index 0000000000..047166e765
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.yearofweek
+description: >
+  Temporal.PlainDate.prototype.yearOfWeek returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDate(2024, 1, 1, calendar);
+
+assert.sameValue(date.yearOfWeek, 2024);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.PlainDate(2024, 1, 1, calendar);
+
+assert.sameValue(nonisodate.yearOfWeek, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDate/prototype/yearOfWeek/shell.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/compare/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/compare/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/compare/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/compare/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/from/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/from/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/from/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/from/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/equals/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/equals/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/equals/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/equals/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/since/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/since/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/since/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/since/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..9abc7e4128
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const dateGregorian = new Temporal.PlainDateTime(2024, 3, 26, 10, 30, 0, 0, 0, 0, "gregory");
+
+assert(
+  dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+
+const dateIslamic = new Temporal.PlainDateTime(2024, 3, 26, 10, 30, 0, 0, 0, 0, "islamic");
+
+assert(
+  dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/until/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/until/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/until/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/until/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/browser.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..5b0fce3473
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.weekofyear
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDateTime(2021, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.PlainDateTime(2021, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(isodate.weekOfYear, 53);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/non-iso-week-of-year.js
new file mode 100644
index 0000000000..b90a9cde8d
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.weekofyear
+description: >
+  Temporal.PlainDateTime.prototype.weekOfYear returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(nonisodate.weekOfYear, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/weekOfYear/shell.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/withPlainDate/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/withPlainDate/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/withPlainDate/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/withPlainDate/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/browser.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..a3846e5d01
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.yearofweek
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDateTime(2021, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(date.yearOfWeek, 2021);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.PlainDateTime(2021, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(isodate.yearOfWeek, 2020);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/non-iso-week-of-year.js
new file mode 100644
index 0000000000..cffb030267
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/non-iso-week-of-year.js
@@ -0,0 +1,25 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindatetime.prototype.yearofweek
+description: >
+  Temporal.PlainDateTime.prototype.yearOfWeek returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(date.yearOfWeek, 2024);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+
+assert.sameValue(nonisodate.yearOfWeek, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/shell.js b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainDateTime/prototype/yearOfWeek/shell.js
diff --git a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/from/shell.js b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/from/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/from/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/from/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/equals/shell.js b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/equals/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/equals/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/equals/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..9011393592
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainmonthday.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const dateGregorian = Temporal.PlainMonthDay.from({ monthCode: "M03", day: 26, calendar: "gregory" });
+
+assert(
+  dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+
+const dateIslamic = Temporal.PlainMonthDay.from({ monthCode: "M09", day: 16, calendar: "islamic" });
+
+assert(
+  dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toPlainDate/shell.js b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toPlainDate/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toPlainDate/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainMonthDay/prototype/toPlainDate/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toPlainDateTime/shell.js b/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toPlainDateTime/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toPlainDateTime/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toPlainDateTime/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toZonedDateTime/shell.js b/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toZonedDateTime/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toZonedDateTime/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainTime/prototype/toZonedDateTime/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/compare/shell.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/compare/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/compare/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/compare/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/from/shell.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/from/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/from/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/from/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/equals/shell.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/equals/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/equals/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/equals/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/since/shell.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/since/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/since/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/since/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..b4816e1b19
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plainyearmonth.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const dateGregorian = Temporal.PlainYearMonth.from({ year: 2024, monthCode: "M03", calendar: "gregory" });
+
+assert(
+  dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+
+const dateIslamic = Temporal.PlainYearMonth.from({ year: 1445, monthCode: "M09", calendar: "islamic" });
+
+assert(
+  dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/until/shell.js b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/until/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/until/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/PlainYearMonth/prototype/until/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/from/timezone-string-legacy-non-iana.js b/js/src/tests/test262/intl402/Temporal/TimeZone/from/timezone-string-legacy-non-iana.js
new file mode 100644
index 0000000000..90f7e9f4f6
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/from/timezone-string-legacy-non-iana.js
@@ -0,0 +1,47 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.timezone.from
+description: Only IANA time zone identifiers are allowed.
+features: [Temporal]
+---*/
+
+// List of non-IANA link names, copied from:
+// https://github.com/unicode-org/icu/blob/main/icu4c/source/tools/tzcode/icuzones
+const invalidTimeZones = [
+  "ACT",
+  "AET",
+  "AGT",
+  "ART",
+  "AST",
+  "BET",
+  "BST",
+  "CAT",
+  "CNT",
+  "CST",
+  "CTT",
+  "EAT",
+  "ECT",
+  "IET",
+  "IST",
+  "JST",
+  "MIT",
+  "NET",
+  "NST",
+  "PLT",
+  "PNT",
+  "PRT",
+  "PST",
+  "SST",
+  "VST",
+];
+
+for (let timeZone of invalidTimeZones) {
+  assert.throws(RangeError, () => {
+    Temporal.TimeZone.from(timeZone);
+  }, "Time zone: " + timeZone);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/legacy-non-iana.js b/js/src/tests/test262/intl402/Temporal/TimeZone/legacy-non-iana.js
new file mode 100644
index 0000000000..aaf9dd1a80
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/legacy-non-iana.js
@@ -0,0 +1,47 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 André Bargull. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.timezone
+description: Only IANA time zone identifiers are allowed.
+features: [Temporal]
+---*/
+
+// List of non-IANA link names, copied from:
+// https://github.com/unicode-org/icu/blob/main/icu4c/source/tools/tzcode/icuzones
+const invalidTimeZones = [
+  "ACT",
+  "AET",
+  "AGT",
+  "ART",
+  "AST",
+  "BET",
+  "BST",
+  "CAT",
+  "CNT",
+  "CST",
+  "CTT",
+  "EAT",
+  "ECT",
+  "IET",
+  "IST",
+  "JST",
+  "MIT",
+  "NET",
+  "NST",
+  "PLT",
+  "PNT",
+  "PRT",
+  "PST",
+  "SST",
+  "VST",
+];
+
+for (let timeZone of invalidTimeZones) {
+  assert.throws(RangeError, () => {
+    new Temporal.TimeZone(timeZone);
+  }, "Time zone: " + timeZone);
+}
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getInstantFor/shell.js b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getInstantFor/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getInstantFor/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getInstantFor/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPlainDateTimeFor/shell.js b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPlainDateTimeFor/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPlainDateTimeFor/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPlainDateTimeFor/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPossibleInstantsFor/shell.js b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPossibleInstantsFor/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPossibleInstantsFor/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/prototype/getPossibleInstantsFor/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/compare/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/compare/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/compare/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/compare/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/from/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/from/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/from/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/from/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/equals/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/equals/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/equals/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/equals/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/era/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/era/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/era/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/era/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/eraYear/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/eraYear/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/eraYear/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/eraYear/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/since/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/since/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/since/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/since/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/toLocaleString/dateStyle.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/toLocaleString/dateStyle.js
new file mode 100644
index 0000000000..b8235d824d
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/toLocaleString/dateStyle.js
@@ -0,0 +1,34 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.plaindate.prototype.tolocalestring
+description: Basic tests that dateStyle option affects output
+locale: [en-u-ca-gregory, en-u-ca-islamic]
+features: [Temporal, Intl.DateTimeFormat-datetimestyle]
+---*/
+
+const dateGregorian = new Temporal.ZonedDateTime(1711475200_000_000_000n, "UTC", "gregory");
+
+assert(
+  dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "long" }).includes("March"),
+  "dateStyle: long writes month of March out in full"
+);
+assert(
+  !dateGregorian.toLocaleString("en-u-ca-gregory", { dateStyle: "short" }).includes("March"),
+  "dateStyle: short does not write month of March out in full"
+);
+
+const dateIslamic = new Temporal.ZonedDateTime(1711475200_000_000_000n, "UTC", "islamic");
+
+assert(
+  dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "long" }).includes("Ramadan"),
+  "dateStyle: long writes month of Ramadan out in full"
+);
+assert(
+  !dateIslamic.toLocaleString("en-u-ca-islamic", { dateStyle: "short" }).includes("Ramadan"),
+  "dateStyle: short does not write month of Ramadan out in full"
+);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/until/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/until/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/until/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/until/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/browser.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..bf1ddaaaeb
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.weekofyear
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.ZonedDateTime(1_609_504_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.ZonedDateTime(1_609_504_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(isodate.weekOfYear, 53);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/non-iso-week-of-year.js
new file mode 100644
index 0000000000..79769e6d19
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/non-iso-week-of-year.js
@@ -0,0 +1,27 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.weekofyear
+description: >
+  Temporal.ZonedDateTime.prototype.weekOfYear returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+
+// Epoch Nanoseconds for new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+const date = new Temporal.ZonedDateTime(1_704_112_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(date.weekOfYear, 1);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.ZonedDateTime(1_704_112_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(nonisodate.weekOfYear, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/weekOfYear/shell.js
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/with/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/with/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/with/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/with/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/withPlainDate/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/withPlainDate/shell.js
index 60f74c2518..5265d86aa2 100644
--- a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/withPlainDate/shell.js
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/withPlainDate/shell.js
@@ -2022,6 +2022,9 @@ var TemporalHelpers = {
         "11-18junk",
         "11-18[u-ca=gregory]",
         "11-18[u-ca=hebrew]",
+        "11-18[U-CA=iso8601]",
+        "11-18[u-CA=iso8601]",
+        "11-18[FOO=bar]",
       ];
     },
 
@@ -2109,6 +2112,11 @@ var TemporalHelpers = {
     plainYearMonthStringsInvalid() {
       return [
         "2020-13",
+        "1976-11[u-ca=gregory]",
+        "1976-11[u-ca=hebrew]",
+        "1976-11[U-CA=iso8601]",
+        "1976-11[u-CA=iso8601]",
+        "1976-11[FOO=bar]",
       ];
     },
 
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/browser.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/browser.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/browser.js
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js
new file mode 100644
index 0000000000..afa4ce7165
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/gregory-iso-weekofyear.js
@@ -0,0 +1,30 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.yearofweek
+description: >
+  In the ISO 8601 week calendar, calendar week number 1 of a calendar year is 
+  the week including the first Thursday of that year (based on the principle 
+  that a week belongs to the same calendar year as the majority of its calendar 
+  days). Because of this, some calendar days of the first calendar week of a 
+  calendar year may be part of the preceding date calendar year, and some 
+  calendar days of the last calendar week of a calendar year may be part of
+  the next calendar year.
+features: [Temporal]
+---*/
+
+// 
+
+let calendar = new Temporal.Calendar("gregory");
+const date = new Temporal.ZonedDateTime(1_609_504_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(date.yearOfWeek, 2021);
+
+calendar = new Temporal.Calendar("iso8601");
+const isodate = new Temporal.ZonedDateTime(1_609_504_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(isodate.yearOfWeek, 2020);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/non-iso-week-of-year.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/non-iso-week-of-year.js
new file mode 100644
index 0000000000..58f0b6a5ff
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/non-iso-week-of-year.js
@@ -0,0 +1,27 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2024 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.zoneddatetime.prototype.yearofweek
+description: >
+  Temporal.ZonedDateTime.prototype.yearOfWeek returns undefined for all 
+  non-ISO calendars without a well-defined week numbering system.
+features: [Temporal]
+---*/
+
+// Gregorian calendar has a well defined week-numbering system.
+
+let calendar = new Temporal.Calendar("gregory");
+
+// Epoch Nanoseconds for new Temporal.PlainDateTime(2024, 1, 1, 12, 34, 56, 987, 654, 321, calendar);
+const date = new Temporal.ZonedDateTime(1_704_112_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(date.yearOfWeek, 2024);
+
+calendar = new Temporal.Calendar("hebrew");
+const nonisodate = new Temporal.ZonedDateTime(1_704_112_496_987_654_321n, "UTC", calendar);
+
+assert.sameValue(nonisodate.yearOfWeek, undefined);
+
+reportCompare(0, 0);
diff --git a/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/shell.js b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/shell.js
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/ZonedDateTime/prototype/yearOfWeek/shell.js
diff --git a/js/src/tests/test262/intl402/TypedArray/prototype/toLocaleString/calls-toLocaleString-number-elements.js b/js/src/tests/test262/intl402/TypedArray/prototype/toLocaleString/calls-toLocaleString-number-elements.js
index c6b895e5db..133d6bb5d7 100644
--- a/js/src/tests/test262/intl402/TypedArray/prototype/toLocaleString/calls-toLocaleString-number-elements.js
+++ b/js/src/tests/test262/intl402/TypedArray/prototype/toLocaleString/calls-toLocaleString-number-elements.js
@@ -1,3 +1,4 @@
+// |reftest| shell-option(--enable-float16array)
 // Copyright (C) 2018 André Bargull. All rights reserved.
 // This code is governed by the BSD license found in the LICENSE file.