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I'm attempting to add the public stream schedule for a Twitch streamer to my calendar in Thunderbird, which is possible because Twitch does offer an API endpoint to get a streamer's schedule via RFC5545-compliant iCalendar file (https://dev.twitch.tv/docs/api/reference#get-channel-icalendar). However, Thunderbird doesn't seem to be respecting the timezone information in Twitch's iCal data and it is not converting event times to my local timezone (America/Chicago). If I open one of the imported events from the iCal in Thunderbird in Edit mode and enable the Show Timezones option, Thunderbird appears to be interpreting the imported start and end times as "Local Time" instead of the timezone specified in the iCal. If I change the timezone in Thunderbird's calendar settings, the start and end times of the calendar events imported from Twitch do not update either.

This happens with ANY iCal from Twitch, but for the sake of illustration, the specific public calendars I'm attempting to add are: > https://api.twitch.tv/helix/schedule/icalendar?broadcaster_id=519794491 > https://api.twitch.tv/helix/schedule/icalendar?broadcaster_id=425292962

Other software (GNOME Calendar and the Open-Xchange-powered platform my e-mail provider uses) is correctly interpreting the timezone data in Twitch's iCal so the issue appears to be in Thunderbird. Any suggestions?

When several Lightning Calendar Reminders are in a popup window list, addressing one Reminder is causing some, or all, other Reminders in the list to vanish. This happens whether Snooze or Dismiss are selected for an individual Reminder.

I live in Morocco. At the weekend our clocks went back 1 hour. However, despite Thunderbird Beta being set to system time for Calendar, it is calculating the time as if my time had not gone back one hour. Any suggestions? Thanks in advance.

if I start Tunderbird I get the message "https://caldav.web.de verlangt einen Benutzernamen und ein Passwort". I have stored the password many times but it appears any time I start Thunderbird

Dobry wieczór

Brak strzałki do przewijania w dół w oknie kalendarza.

Proszę o dodanie strzałki do przewijania w dół.

Z góry dziękuję i pozdrawiam Mooner

Always the same bug and it seems nobody from MOZILlA is able to troubleshoot.

When I open Thunderbird, the following panel appears. I cannot delete it.

Authentification require -Mozilla Thunderbird" https://caldav.gmx.com ask for a user name and a password.

I never create this account

Regards Marc [redacted] @gmx.com

I want to sync calendars across Thunderbird and iPhone. (Linux Mint 22 Wilma, Thunderbird 140.14.1 esr)

I am trying to use the Apple calendar server to sync with. Using the Create New Calendar dialog box in Thunderbird, then applying the Apple-assigned password, Thunderbird returns "Could not find calendars at this location. Please check your settings."

I would appreciate help with this.

Hi everyone. I have setup Synology Calendar on my NAS, and I am now able to Sync my calendar across multiple devices. While events in calendar sync, I am unable to create tasks that will sync to all devices, and have the "Please select a calendar that supports tasks" at the bottom of the panel on my calendar panel.

I see there is discussions for this same situation, but for syncing Google accounts.

Does anyone know if I can do this in Thunderbird or do I just live with events working?

TIA.

For no apparent reason the calendar display has been filled with multiple columns of light and dark blue, side by side and extending top to bottom. This pattern starts in The August 31st column and continues up to and including September 7th. After that the display goes back to normal. Does anyone know why this has happened and how to fix it? Thank you.

Have used Thunderbird for years and never had this issue before. Just upgraded to Thunderbird 115.18.0 esr and my calendar is now blank. Did the upgrade erase the data or is a pointer off somewhere? Can I get my calendar back?

I want to copy my calendar from my Mac whrwe I use Week Calendar into Thunderbird Calendar, but I have not got it to work there. I read somewhere that Thunderbird art developing the calendar. Will it work now??

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

I have upgraded to TB153.0.3ESR. I've been on the ESR stream for a long time now. But recently, I started having trouble with my google calendar appearing. I've deleted the provider plugin, I've moved to OAuth2, and for the most part, calendars that I have that are read-only from google show up all the time. But my personal read/write google calendar will not show up.

If I go in and delete the cache.sqlite file, and then start Thunderbird, my entries show up. However, if I switch to a different week, my read-only calendars still show up, but my personal calendar goes away.

I've tried everything listed in all of the steps to fix this, but I can't find anything that gives a clue as to what is happening. Anyone else see this?

Steve.

Little thing. None of the sections seemed appropriate. Win 11 153.0.3 (64-bit) In the left-hand panel of Calendar the top left icon of the actual calendar day/week/month matrix is supposed to take you to today (though it's not obvious by the icon which changed a few versions back). When first coming to it after a restart (hibernation mostly in my case) it doesn't move the highlighted day. I have to click first on any other day, then click the icon for it to go to today.

For some time, I've occasionally noticed a bug in Thunderbird where a task's description text is different depending on how its viewed. When a task is viewed in the lower pane or by double clicking it, the Description box contains old data. However, if the same task is hovered over with the cursor in the tasks list, the tooltip popup shows the current, up-to-date description data. If I cause the task to update server-side on my Nextcloud DAV server, then Thunderbird picks the update up correctly and all sources show the same data.

I'm not sure how to trigger this bug. Can anyone provide additional info?

I was attempting to import the calendar info from my old system to my new one, but the export/import of a .ics file did not work. It complained about information not being found. Then I tried copying the local.sqlite database file from my old system to the new one, that initially did not appear to work either :( Come to find out that the database cal_id fields did not match between my new system and the old one, so even though the local.sqlite file I copied had all of the calendar information, the prefs.js file on my new system was referring to a different cal_id. So I used a text editor to replace all of the cal_id's in the prefs.js file, with the cal_id found in the copied local.sqlite file, and now I have all of my calendar data available on my new system. You might want to make this know to your users, since my original searches on your support site did not present a solution that worked. :(

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.

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.