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happens on Windows 11 also

Every birthday or holiday reminder (I haven't entered these) generates an error when i select snooze or snooze all. The reminders I have entered snooze fine. Using gmail calendar.

I successfully linked / synced the thunderbird calendar with the iCloud calendar. Calendar entries manually entered in iCloud or iPhone calendar are successfully synced and are visible in the thunderbird mail. The other way round, syncing the existing entries in the Thunderbird calendar does not work. They do not appear in the iCloud or iPhone calendar. Searching the internet, the specific Thunderbird or Apple help-sites did not provide an obvious solution for this problem. I went through all (or nearly all) recommendations given by Apple, no success to sync from Thunderbird to iCloud.

Any suggestion what to modify or adjust

jm

Used Outlook Mac 2011 for years. It crashed and could not retrieve from Time Machine. Lost everything since 2021. Apple was able to restore my calendar in Calendar app but I'd like to have integrated app and am trying Thunderbird for email. I would love to use it's calendar and contacts. I am nearly 90 and it's hard to learn new tricks but I'm trying. Any help appreciated. Thanks.

Problem Initiating New Calendar in Thunderbird 140.12.1esr. Currently sharing calendar information between two accounts, both from Google calendar. Syncing between Google and Thunderbird has been working smoothly. Recently added KC Chiefs schedule to Google calendar. The KC Chiefs schedule displays correctly in Google, but does not display in Thunderbird. Attempts to add the Chiefs schedule directly to Thunderbird using the indicated (Google) 'Integrated Calendar' links fails. How do I obtain an .ics file to add this to my Thunderbird. Additional thoughts, my system is Linux Mint, and I am currently operating behind a VPN. Thanks,

This will make more sense if you look at the attached images first. If I create two one-hour appointments back to back on the same day--meaning the first appointment ends at the same time the next one begins (or with a 1 min gap), and then I look at my calendar in Week view, I'll see 2 full-column 1-hour blocks stacked one above the other as in the "1hr appt.png" attached. This appears to be the correct way it should appear.

But if the earlier appointment is only 30 minutes, they appear differently, as in the other image "30min appt.png". squeezed into two columns. I would like them to appear as a single, full column (as with the 1 hour appointments), which it does in the Day view.

Is this a bug? Can I change this behavior?

When I'm in Calendar, I see a certain time interval, depending on screen size. In the first example below, it goes from 07:00 to 21:00. When I toggle between Calendar and Email tabs (using shift+tab or by mouse-clicking) and back to Calendar, the time interval now shows 06:15-20:15. (second image) If I toggle once more, it starts at 05:15, and so on, it goes back one hour after each toggle, until it reaches 00:15. This is very annoying because I have to constantly toggle between Email and Calendar, so the Calendar is more and more shifted and I have to move it manually to keep working. I haven't seen this bug described before. Do other people experience it? Any solutions?

Thanks, Franck

I'm a new Thunderbird user and my question is the simple one typed into the "Summarize your question" box. There doesn't seem to be an appropriate topic, so please excuse the "off-topic" topic.

TIA, Allen

For the last two days, every time I start Thunderbird, a pop-up requests me to log in into Google Calendar. I have followed what little advice I can find:

• Unsubscribed/deleted all calendars
• Deleted all Gmail Accounts
• Deleted all saved passwords, and re-entered them only for my current email accounts.

How do I get rid of this irritating and unnecessary pop-up? I have updated to v128.14 but the problem persists.

Thanks in advance.

John

The Thundebird calendar in month/week view cannot display a full week next to each other. (full width image attached) No matter what I tried. I tried to minimize the left panel (left panel minimized image attached). That barely gives me the saturday added. But still no sunday. If I select a specific sunday from the list of events above, then the whole panel moves to the right, thereby hiding the monday (attached image shifted right) I have even tried to decrease the font used

Is there any way to get all 7 days visible? Is there some magic trick to decrease the width of the week/month view. Why is this not a dynamic view? Workweek = 5 days, week = 7 days

I just installed ESR 140, coming from 115 (Win7). A change I find very bothersome is that when I now search the calendar (All Events) the results return a separate entry for each occurrence of a recurring event instead of just the one definition of the recurring event. How do I make the search behave as it did previously? I have dozens of recurring events that recur weekly and have been using Thunderbird for over a decade... I am staring at hundreds of duplicate search results which also temporarily freezes the app while they load in. This is not a functional design.

Greetings all!

Thunderbird version is 1.52.0

Since this morning (8:00 CET) I have to enter password for my google calendar every time I start Thunderbird. No matter what authentication options I choose, calendar manager keeps asking me to authenticate. "Don't ask again" is turned on. Gmail is set up as OAuth for both incoming and outgoing servers, and it works fine.

Things I've tried since:

- Removed legacy connection in password manager, when I was using IMAP to connect to Gmail - Revoked OAuth permission from google account for Calendar and from Thunderbird password manager - Unsubscribed from calendars and added them again after restarting Thunderbird

I don't know what more to do. Also, I don't know what happened, really, as it worked properly last night.

Just shortly Thunderbird always asks for verifying the Google-Calendars when starting Thunderbird.

I already tried to change it to ical via private Calendar-address...

Why is this suddenly happening and how to resolve?

Chris

Good morning, for some time now, appointments on the calendar that were scheduled before I open Thunderbird have been “forgotten” and don't appear. For example: an appointment (or memo) at 8:00 a.m.; I open Thunderbird at 9:00 a.m., and the appointment doesn't show up. Thank you.

I just upgraded from thunderbird 140 to 152 on Windows 11. I have master password setup.

Every times I start thunderbird, calendar keeps asking for authentication ( oauth ) , I did login successfully and was able to view and modify my events.

After a couple of startup I decided to click on the close button of the oauth authentication windows for calendar. I still able to see and modify my calendar successfully. Is it a bug or I miss something in the calendar settings  ?

Thanks

I don't know what to do when February 29 is in my calendar, 2026 is not a leap year. I've found nothing to help me. I have the latest version if Thunderbird. Thanks

I don't wish to use the calendar that comes with Thunderbird, but instead continuing with my Macintosh iCal.

1) How do I switch off the Thunderbird calendar function? 2) How do I get the calendar invitations sent to me as an ICS file attachments, that I can open in Mac iCal. Just like in Airmail and in Microsoft Outlook.

Jonas Möller Nielsen Sweden