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Thunderbird 91.10.0 (32-bit), Windows 11. My PC went to sleep as normal while I was out for a few hours. When I returned and woke it up to check my emails I noticed the Thunderbird Calendar had gone - just the Inbox is there. In the View menu Calendar and Tasks are greyed out. The Calendar is stand-alone on the PC, not synched anywhere. I had put a couple of new Calendar entries in earlier, everything looked fine. No updates, installs or uninstalls before this happened. A Bitdefender scan says my system is clean. Email seems to be working fine. I have reached the limit of my technical abilities, any suggestions please?

I need to sync TB with Outlook.com calendar. But tbsync will not work with TB 102.0b8. Apparently hasn't been updated as yet. I can always back up to the previous version of TB, but I'm afraid I will lose features in this new version. Any help would be appreciated. BTW, this particular PC of mine is running Windows 8.1 due to the needs of a particular business application I use.

I just updated to 102 and lost calendar. I tried instructions from your help page. Got as far as "extensions.installedDistroAddon.{e2fda1a4-762b-4020-b5ad-a41df1933103}". What I see is that boldface in a box with True further to the right and then a toggle and delete icon. When I right click I only get a box that says copy, paste or select all, with select all being the only option available. I tried toggling to false and then continuing. When I go to the add on manager and select extensions, there are none listed. I tried restarting Thunderbird at that point, but the calendar is still not showing my info. Help!

Hello this morning Thunderbird Updated in Germany to Vers. 102. At vers. 102. Calender shows no categories in Google Calender or Web.de Calender.

I have added TbSync and CalDev/CardDev to each of 3 Thunderbird Lightning accounts and have set up 1 account on woelkli.com (their cloud area). I had hoped that adding a calendar event on any one of the 3 Thunderbird would then be replicated in the other 2 accounts. This does not happen and I am unsure what I need to do to make it work. Please could someone advise me. Thank you

Since upgrading to Thunderbird v102 on my Mac I've lost events from my Lightning Calendar. I seem to have lost all my bi-weekly or monthly repetitive events (my one-off or annual repetitive events seem to be in tact).

I've tried closing the calendar and restarting Thunderbird but all to no avail. I was wondering whether I might restore my Lightning Calendar from my Time Machine backup (before I updated to v102) and, if so, what files I might need to replace.

As mentioned in title I cannot use the calendar function at all. Same with tasks function:

• I can open the calendar tab, but that's it.
• There is no calendar on the calendar list, and the 'plus'-icon to add a new calendar is greyed out.
• There are buttons to change the views (week, day etc) but these also are greyed out.
• Same issue with tasks: I can open the tab, but cannot add any tasks

It all worked with older versions of TB. I had several calendars in place, no problem. But after some upgrade everything is gone. The calendars, originally set up on TB, are still there, but only accessible on the g-account...

Version: TB 91.11. Add-ons: Provider for google calendar

Any idea? I really want to use TB calendar function instead. If I could at least only set up a new calendar, that would be very helpful. Thx a lot in Advance!

Hello, 24hrs time was working fine with former Thunderbird. 24hrs time disappeared from calendar when installing Thunderbird 102. In Windows 10 clock: time is correctly set to 24hrs. No way to install 24 hrs in Thunderbird 102 settings. How manually set windows 24hrs time with Thunderbird config? Thank you.

OK, TB is driving me crazy with two Zoom events (plus others in the past that I just had to delete because they were so annoying.)

Whether I click "Dismiss All" or click on the individual event and "Dismiss", they pop right back up. Same thing happens when I try to close the window.

I have removed mail extensions (Provider and another that I can't remember the name of), deleted the calendars, restarted TB, and added the Google Calendars again... but they still pop up.

And, again, this seems to only happen with Zoom events but not all Zoom events... not even all Zoom events on one calendar.

Finally, the calendar is not set to Read-Only.

This is driving me crazy because not only can't I Dismiss them, they also beep every five minutes. Right now I have to disconnect the Calendar before I lose my sanity.

When I enter an event on Thunderbird, it is immediately reflected on my online Google Calendar. However, when I enter the event on google calendar website, it does not automatically appear on my Thunderbird Google Calendar. Don't understand this. The only add-on I have on Thunderbird is the 'Provider for Google Calendar' (to allow bidirectional access to google calendar). I don't see any settings to fix this. Help! Note: It updates when I press 'synchronize' on Thunderbird, but I don't want to have to remember to do that. Should be automatic!!

Everything works fine before upgrading from v74 to v91. After upgrading to 91, all dates are 09:59 in the calendar (please see image.) Restoring to 74 and everything works fine again.

Hi

I recently upgraded my Thunderbird client to v102. The calendar export options have changed and when reviewing the Release Notes Release Notes I note in the "Changed" - Support for importing and exporting calendars from Outlook CSV format was removed

This has significantly impacted my usage. This is where my timesheets are created / stored. This format is excellent for further analysis and billing. To use html or ics is very limiting and problematic for such purposes.

From what I have found online, all ics to csv convertible tools are a extremely poor substitute

Can this be reversed or can someone suggest an add-on to remedy this situation ?

Thanks

Version 91 works correctly on other machines. On one machine that is updated to 102.0.1: Create a New Task DOES work for CalDav calendars. Convert mail to task DOES work for local Home calendar. Convert mail to task does NOT work for CalDav calendar. No task gets created. (It does still work in 91.) Move a task from Home to CalDav DOES work if the Home task was created with New Task. Move a task from Home to CalDav does NOT work if the Home task was converted from mail message. CalDav is DAViCal (on Linux, Apache) which is still serving TB ver. 91 machines. All TB 91 and 102 instances are running on Windows 10 21H2 with Firefox 102. Any advice? What more can I tell you?

Since upgrading to v102 I've lost events in my calendar and am progressively losing historic data that I wanted to keep (events that were there last week aren't there this week). I've tried copying a backup of local.sqlite and checked the entries in prefs.js to no avail. If I can't fix then I'm going to have to dump Firefox and Thunderbird.

Hello,

After upgrading to Tb 102.0.2 calendar (Lightning) is not following "Date and Time Formatting" setting. Anyone knows how to fix it?

Thanks,

JM

Hi there,

the event time selected during event creation has the 24 hrs format I want, but the calendar after it has been created shows it with 12 hrs format - see the uploaded image: is there any way to fix it?

I'm running Thunderbird 102, 64 bit, fresh installation (not upgrade) on Win 10.

Thanks in advance.

Jbourne_sk

I had opened a ticket before (https://support.mozilla.org/en-US/questions/1354662), and got "some" help, tho it was still happening intermittingly, until recently, when it resumed in full force. https://www.screencast.com/t/3sFZdgMyt

I am not running the "Provider for Google Calendar" any more. I did a Google login and asked it to find my calendars, which it did. I have 13 calendars being displayed on the calendar tab. My version is 91.11.0 (64-bit), and yes, I am aware there is a newer version (102) but some of my clients who I recommended Thunderbird to are on it, and hate the new changes and are having trouble with it scrambling email content, cross linking a subject with another email when opening and the like. I won't be upgrading until those problems are resolved.

I am on a new laptop (since the last support ticket) running Windows 10 Home. I keep my Windows up to date and security patches installed.

Processor 11th Gen Intel(R) Core(TM) i7-11800H @ 2.30GHz 2.30 GHz Installed RAM 64.0 GB (63.7 GB usable) System type 64-bit operating system, x64-based processor Pen and touch No pen or touch input is available for this display Edition Windows 10 Home Version 21H2 Installed on ‎6/‎11/‎2022 OS build 19044.1826 Experience Windows Feature Experience Pack 120.2212.4180.0

Any help or additional suggestions are welcome. I'm being driven crazy by reminders that won't cancel.

How can I submit a defect for Thunderbird / Lightning calendar? I'm not sure about using Bugzilla myself.

I was typing a bit fast and accidently entered 4 chars for the year on a new calendar event and saved it. After that the event vanished from the calendar. I used Events and Tasks > Find events to locate it but when I clicked on it Thunderbird crashed.

SEE attached annotated SCREEN-SHOT file (Tbird ICS file process.jpg)

Is there any way to process this .ICS file ... "Upcoming Appointment (4).ics" ... directly into the Thunderbird calendar as soon as I click on the link-phrase "Add to calendar" ... without having to save it first and ... then double-click on the saved file ???