3 files changed, 49 insertions, 0 deletions
diff --git a/lib/time/README b/lib/time/README
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+The zoneinfo.zip archive contains time zone files compiled using
+the code and data maintained as part of the IANA Time Zone Database.
+The IANA asserts that the database is in the public domain.
+
+For more information, see
+https://www.iana.org/time-zones
+ftp://ftp.iana.org/tz/code/tz-link.html
+https://datatracker.ietf.org/doc/html/rfc6557
+
+To rebuild the archive, read and run update.bash.
diff --git a/lib/time/update.bash b/lib/time/update.bash
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+++ b/lib/time/update.bash
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+#!/bin/bash
+# Copyright 2012 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# This script rebuilds the time zone files using files
+# downloaded from the ICANN/IANA distribution.
+# Consult https://www.iana.org/time-zones for the latest versions.
+
+# Versions to use.
+CODE=2021e
+DATA=2021e
+
+set -e
+rm -rf work
+mkdir work
+cd work
+mkdir zoneinfo
+curl -L -O https://www.iana.org/time-zones/repository/releases/tzcode$CODE.tar.gz
+curl -L -O https://www.iana.org/time-zones/repository/releases/tzdata$DATA.tar.gz
+tar xzf tzcode$CODE.tar.gz
+tar xzf tzdata$DATA.tar.gz
+
+make CFLAGS=-DSTD_INSPIRED AWK=awk TZDIR=zoneinfo posix_only
+
+cd zoneinfo
+rm -f ../../zoneinfo.zip
+zip -0 -r ../../zoneinfo.zip *
+cd ../..
+
+go generate time/tzdata
+
+echo
+if [ "$1" = "-work" ]; then
+	echo Left workspace behind in work/.
+else
+	rm -rf work
+fi
+echo New time zone files in zoneinfo.zip.
diff --git a/lib/time/zoneinfo.zip b/lib/time/zoneinfo.zip
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--- /dev/null
+++ b/lib/time/zoneinfo.zip