1 files changed, 27 insertions, 0 deletions
diff --git a/js/src/tests/test262/intl402/Temporal/TimeZone/from/iana-legacy-names.js b/js/src/tests/test262/intl402/Temporal/TimeZone/from/iana-legacy-names.js
new file mode 100644
index 0000000000..d04aa99656
--- /dev/null
+++ b/js/src/tests/test262/intl402/Temporal/TimeZone/from/iana-legacy-names.js
@@ -0,0 +1,27 @@
+// |reftest| skip-if(!this.hasOwnProperty('Temporal')) -- Temporal is not enabled unconditionally
+// Copyright (C) 2022 Igalia, S.L. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+esid: sec-temporal.timezone
+description: IANA legacy names must be supported
+features: [Temporal]
+---*/
+
+const legacyNames = [
+  "Etc/GMT0",
+  "GMT0",
+  "GMT-0",
+  "GMT+0",
+  "EST5EDT", 
+  "CST6CDT", 
+  "MST7MDT", 
+  "PST8PDT"
+];
+
+legacyNames.forEach((arg) => {
+  const tz = Temporal.TimeZone.from(arg);
+  assert.sameValue(tz.toString(), arg, `"${arg}" does not match "${tz.toString()}" time zone identifier`);
+});
+
+reportCompare(0, 0);