The tzdata packages contain data files with rules for various time zones.
The tzdata packages have been updated to version 2021e, which addresses recent time zone changes. Notably:
The Pacific/Fiji timezone has suspended daylight saving time (DST) for the 2021/2022 season.
The 'zic -r' command now marks unspecified timestamps with "-00".
Palestine will end daylight saving time (DST) on October 29, 2021 at 01:00, rather than the predicted October 30, 2021.
(BZ#2015242, BZ#2015246, BZ#2016369)