<i18n dev> TZ database 2021b changes
y.umaoka at gmail.com
Tue Sep 28 15:34:56 UTC 2021
Hello OpenJDK i18n dev team,
As you may already know, TZ database 2021b was released last week, and
it contains some drastic changes for pre-1970 rules. Multiple zones
sharing post 1970 rules were merged into one, and they were moved to
backward file. Pre-1970 rules used for these merged zones in 2021a were
in backzone file, but it's not a part of standard package.
In the tz mailing list, many TZ database consumers are worrying about
this move. It looks not a small number of people are against this
change, and some are considering to maintain database separately to
maintain rules for pre-1970 dates.
I'm curious about what Java i18n team will do for this. Do you plan to
accept the changes done in TZ database 2021b as-is? Or do you plan to
preserve rules in backzone?
We discussed this topic in Unicode ICU team meeting last week. We don't
have long term strategy yet. However, DST change in Samoa is already in
effect, we're going to ship a quick patch including 2021b zone rule
updates applied on top of 2021a for now (today or tomorrow).
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