Repository navigation
[ical4j 4.x] Update / drop AndroidCompatTimeZoneRegistry #198
Description
AndroidCompatTimeZoneRegistry was introduced mainly for one case where a time zone was known to Android and ical4j with two different names (Europe/Kiev and Europe/Kyiv), without alias in ical4j. The problem was also that the aliases were not updated regularly because we couldn't update ical4j.
I think this class can be completely dropped. However that should be checked and then the class should either be rewritten or dropped. To check:
We can check whether this problem still exists with ical4j 4.x (that it writes Europe/Kyiv to Androids which still only know Europe/Kiev) and the AndroidCompatTimeZoneRegistry is still needed.
Note
If the class is dropped, ical4j.properties needs to be updated, too. We can just remove net.fortuna.ical4j.timezone.registry= to use the default value (DefaultTimezoneRegistryFactory).
Done if:
AndroidCompatTimeZoneRegistryis dropped (also remove inical4j.properties!), orAndroidCompatTimeZoneRegistryis rewritten to ical4j 4.x
Activity
rfc2822 commentedon Mar 11, 2026
If the only reason is to map the TZID for Android in a certain way, it should probably be handled by "androidifyTimezone" or so instead so the class can probably be dropped.I'm quite sure that the class can be dropped. So the question is rather how to map specific TZIDs. This can probably be done either in
DatePropertyTzMapper.systemTzIdor in the logic that drivesDatePropertyRuleandDateListPropertyRule(used inICalPreprocessor).