tree d2a892c1f6eaddbb9787aa522c308b149a146b86
parent bda61723eb5de71c78eb448f1c353dfc2e6677f3
author Frank Tang <ftang@chromium.org> 1588023324 -0700
committer Frank Tang <ftang@chromium.org> 1588027636 +0000

Update IANA timezone db to 2020a

https://mm.icann.org/pipermail/tz-announce/2020-April/000058.html
    Morocco springs forward on 2020-05-31, not 2020-05-24.
    Canada's Yukon advanced to -07 year-round on 2020-03-08.
    America/Nuuk renamed from America/Godthab.
    zic now supports expiration dates for leap second lists.

The tz-related files are updated by running update_tz.sh and ICU
data files are rebuilt.

Either in JS console in Chrome or v8 should work like these:

// a) Morocco springs forward on 2020-05-31, not 2020-05-24.
df = new Intl.DateTimeFormat("en", {timeZone: "Africa/Casablanca", timeStyle: "long", dateStyle: "long"})
d1 = new Date("2020-05-25T00:00:00.000Z")
d2 = new Date("2020-05-31T00:00:00.000Z")
df.format(d1)
df.format(d2)

Before the changes
"May 25, 2020 at 1:00:00 AM GMT+1"
"May 31, 2020 at 1:00:00 AM GMT+1"

After the changes expect to see
"May 25, 2020 at 12:00:00 AM GMT"
"May 31, 2020 at 12:00:00 AM GMT"

// b) Canada's Yukon advanced to -07 year-round on 2020-03-08.
df = new Intl.DateTimeFormat("en", {timeZone: "Canada/Yukon", dateStyle: "long", timeStyle: "long"})
d3 = new Date("2020-03-09T00:00Z")
d4 = new Date("2021-03-09T00:00Z")
df.format(d3)
df.format(d4)

Before the changes
"March 8, 2020 at 5:00:00 PM PDT"
"March 8, 2021 at 4:00:00 PM PST"

After the changes expect to see
"March 8, 2020 at 5:00:00 PM MST"
"March 8, 2021 at 5:00:00 PM MST"

// c) America/Nuuk renamed from America/Godthab.
df = new Intl.DateTimeFormat("en", {timeZone: "America/Nuuk"})
df.resolvedOptions().timeZone

Before the changes
Uncaught RangeError: Invalid time zone specified: America/Nuuk

After the changes expect to see
"America/Godthab"

Bug: 1074578
Change-Id: I21cb510966d1d0c1306422107c449fbc556bd47e
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/deps/icu/+/2168814
Reviewed-by: Jungshik Shin <jshin@chromium.org>