date: alphabetic time zone abbreviation (%Z) prints local timezone, not the one specified in TZ #7497
Description
My local timezone in /etc/localtime is CET (Central Europe).
$ LANG= cargo run date
Wed Mar 19 20:05:44 CET 2025
Correct.
$ LANG= TZ=Asia/Taipei cargo run date
Thu Mar 20 03:06:12 CET 2025
Time is correct, but timezone is local CET, not CST.
A reduced test case can be shown with:
$ LANG= TZ=Asia/Taipei cargo run date +%Z
CET
$ LANG= TZ=US/Pacific cargo run date +%Z
CET
(note that TZ= correctly prints UTC, but prints the wrong date: #7498)
coreutils reference:
$ LANG= date
Wed Mar 19 20:09:23 CET 2025
$ LANG= TZ=Asia/Taipei date
Thu Mar 20 03:09:32 CST 2025
$ LANG= TZ=Asia/Taipei date +%Z
CST
$ LANG= TZ=US/Pacific cargo run date +%Z
PDT