I created a network calendar and enabled offline support. However, starting thunderbird with no network-connection, the calendar doesn't show anything. I expected that I would see my calendar entry. Is this a bug oder do I expect the wrong thing? How can I debug this? I'm using Thunderbird-Version: 60.2.1 (64-Bit) Lightning-Version: 6.2b6 with Linux Mint MATE 18.3

  • You can export your network calendar as an .ics file and open it locally. Why, though, would you expect a "network calendar" to be available without network connection?? – DrMoishe Pippik Dec 23 '18 at 4:39
  • Well, in practice: when travelling by train I have often lose network, nevertheless I want to know my dates. Beside, there's the option: Offline support (especially for network calendars in lightning), thus I expected it or want to know what it means. – user3656083 Dec 23 '18 at 12:35

With Thunderbird 60.4.0 and Lightning 6.2.4 under GNU Linux system, I find a ~/.thunderbird/<id>.default/calendar-data/backup/ directory, in which I find several ICS calendars which seems to contain the offline information for my remote calendar.

So it seems that I can consult my remote calendar offline by importing one of these ICS into a new calendar.

It feels however silly to have to create a new calendar and manually do such import. I really wish the "offline support" of Lightning for remote calendars would provide a user-friendly (if not automatic) way to switch between remote server and offline local cached data.

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