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When I opened the Thunderbird Calendar this morning 99% of information, appointments, meetings, birthdays, etc. are missing. The Monthly view shows one or two events, the rest of the days are blank.

I am using Thunderbird 91.9.1. I have imported several calendars from my google account which works really well. What does not work well is trying to import/show my google tasks, they simply appear nowhere. How I tried to import them: Calendar -> New Calendar... -> On the Network -> Entering my google account at Username -> after logging in, only my google calendars are shown, not the tasks.

What am I missing? Thanks!

I am evaluating TB and the integrated calendar. I had no problem installing mail and calendar in terms of synching, mailing, and receiving except one: The calendar page will not refresh unless I hit the Hide/Show eye icon next to the calendar. Sometimes it also shows if I toggle from Today to Week.

Calendar properties do not show any options at the bottom for refresh cycles (see attachment). Other specs are below.

This is a show stopper for me, since appointments that were transferred but not showing are of no use. Please advise.

Thanks, Michael Clifford Details below

TB Synch - Periodic Synch set to 1 minute Win 10 Home Imap Mail Server outlook.office365.com checks for msgs every 3 minutes TB 91.9.0 (64-bit) Provider for Exchange ActiveSync

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 all and thanks in advance.

When accepting an appointment/import ics I get the error in the error console

Calendar: Couldn't find Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna

The meeting is sended from Outlook for Mac. I use Thunderbird 91 on Ubuntu 20.04

Content of the ics file: BEGIN:VTIMEZONE TZID:Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna X-ENTOURAGE-CFTIMEZONE:Europe/Amsterdam X-ENTOURAGE-TZID:9 BEGIN:STANDARD

My current time zone in the setting is: Europe/Amsterdam

Any suggestions to be able to accept the meeting?

Cheers!

In or around TB 91.3.1 double-clicking on an event, you get a dialog box such as the attached. In order to edit the event, you have to hit the Edit button. In the past, TB would just open the event and allow you to edit it. If the event was recurring then, and only then, would a small dialog box come up to ask if you were editing just this event or all events. I see no advantage to this extra dialog box, especially for one-time-only events. It's just another unnecessary click of the mouse.

When I try to import an ics file into the Calendar I receive a message "Cannot import from Downloads/appointment.ics. There are no importable items in this file." I found some articles where the line endings were not correct, I checked they are OK. I checked for invalid characters, there are none. So how I import the ICS file? What is not correct in the file? The file is: BEGIN:VCALENDAR VERSION:2.0 PRODID:-//Sabre//Sabre VObject 4.3.3//EN CALSCALE:GREGORIAN BEGIN:VEVENT UID:sabre-vobject-40eef33e-ae8f-4ebd-bae1-1e7f9b11a28f DTSTAMP:20220603T193644Z SUMMARY:Appointment - mymeeting DTSTART:20220707T133000Z DTEND:20220707T140000Z LOCATION:6875 Bd Rue Mycity Canada ORGANIZER;CN=1: ATTENDEE;CN=1: END:VEVENT END:VCALENDAR

I am running Thunderbird on Linux, using version 91.4.1 (64-bit). My OS is set to use a 12 hour clock, yet all times in Thunderbird use a 24 hour clock. I checked out the help article, and it seemed to indicate having the locale set to English (United States) in preferences should get me the 12 hour clock, but both Application locale and Regional settings locale show that option. Switching does not change anything. I tried looking in the config editor, but I was unable to locate any of the settings to change time formats mentioned in the help article.

Why is Thunderbird stuck on a 24 hour clock?

The help article I tried: https://support.mozilla.org/en-US/kb/customize-date-time-formats-thunderbird

So. Thunderbird released an update, I updated, and all my custom event colours, that I really need, have gone from old to current see attachments. This was asked https://support.mozilla.org/en-US/questions/1326997?utm_campaign=questions-reply#question-reply

And a solution found that worked. Now Mozilla in their ludicrous wisdom have somehow screwed this up again. Anyone have a solution that works? I and lots of other people like the whole event title bar being a single colour. These 'dots' at the end are useless to see. Thanks PS Stop screwing with the settings. What to add something new, then create an add-on.

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

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.

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.

I´m using TB 102.0.1 in Windows x64 Professional. I have config TB to work in English (menus, notifications, etc.), but with this update I have to change to Spanish language to allow the 24h format in Calendar. Every time I change to the Regional setting (Spanish) from an English language the Calendar change to AM/PM format, when I have config Windows to 24h format (HH:mm). I have always config TB to work with English menus, but I lost this possibility with the last update. Windows 7 Professional work with an Spanish language installation, and I suppose that in this new version of TB something has change with the Language/regional configurations. Is there any possibility to select the "time format" of the Calendar (24h to AM/PM or AM/PM to 24h)? Thanks

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!