Created attachment 106855 [details] Add: UNTIL field in RRULE I create an event in KOrganizer from 15:00 to 16:00... SOGo shows that event starts at 14:00. (TZ: Europe/Moscow) Patch in attachment fixes it up.
Git commit 0fd1f0fae1de743da5bc9d56577541442e84799b by Allen Winter. Committed on 29/07/2017 at 17:28. Pushed by winterz into branch 'Applications/17.08'. src/icaltimezones.cpp - write UNTIL field in RRULES thanks for the patch M +1 -0 src/icaltimezones.cpp https://commits.kde.org/kcalcore/0fd1f0fae1de743da5bc9d56577541442e84799b
I think this patch could be problematic because it leads to this bug reported for korganizer: https://bugs.kde.org/show_bug.cgi?id=385364 It seems the ICAL RFC forbids UNTIL and COUNT appearing at the same time in an RRULE. And Outlook CalDav Synchronizer for example doesn't accept such events.