Diễn đàn hỗ trợ Thunderbird

Hello,

I'm trying to create a calendar event with irregular recurrence. Not only is the starting time different, but also the duration. Since AFAIK this is not possible using the interface, I directly edited the .ics to this:

RDATE;VALUE=PERIOD:20260506T063000Z/20260506T130000Z,20260507T054500Z/20260507T110000Z

I then manually synced the calendar. The starting time is honored, the duration, however, is not. I found the entry in the .ics changed by Thunderbird to this:

RDATE:20260506T063000Z RDATE:20260507T054500Z

How can I get Thunderbird to honor the different durations?

Thanks

I have a shared family calendar and a private google account calendar that is separate. I tried importing some events from the family calendar to the private calendar. I created a .ics file, and started using the calendar import function in Thunderbird on my Ubuntu laptop. I found the file, selected it, and filtered for current and future events. I then clicked the confirm import button, and the screen changed to a view progress screen. This screen correctly shows the target account, the source file, the import type, and the number of events, so I think it's correctly set up. The progress bar shows "Importing... 0%", and there it appears to stall, consistently after several attempts. I saw another thread that talked about read-only calendars, but I don't see a setting, either at the Thunderbird level or at the calendar level that might be restrictive in that sense. Is there a preparatory step or a setting I'm overlooking?