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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

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

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

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. I wanted to ask you about the option of switching between calendars in thunderbird I have two gmail accounts and I mainly use one of them altogether with the calendar. Thunderbird automatically loaded the calendar from the other account. I tried to switch it by going to Edit - Calendar preferences - and marking the right calendar account but it still didn't work. How do I do it? I also change the language but somehow the actions don't apply. Is there an option how to save the changes I am making?

Sebastian

I followed the instructions here: https://support.mozilla.org/en-US/questions/1364439 After pasting in the URL of the Google Calendar from the browser, the process asks for the password used for the Google account. I provide the password, but the response is "The credentials you have entered were not accepted."

To confirm that the user name (my Gmail account) and password were entered correctly, I logged out of Calendar on the browser and logged in again using the credentials that were refused by the Create New Calendar process.

This isn't a showstopper, but it would be nice to have the calendar in Thunderbird.

Information on how to add the Google 'Tasks' into Thunderbird Calendar: I have a gmail imap account using OAuth2 as Authentication Method.

File > New > Calendar, select 'Google Calendar' >  click on 'Next' choose or enter: gmail email address   > click on 'Find Calendars' Select 'My Tasks' and click on 'Subscribe'

You may be asked to enter password as per Oauth2 Authentication.

See image. It shows the selection available when you follow instructions. It shows where 'My Tasks' is located in the Calendar list. I selected 'My Tasks' and then clicked on 'Task'. Create the Task and save. Task is shown in Thunderbird and on the right side you can see the Task is displayed via the webmail access using a browser.

With the update to release 91.13.0 the icon to open the calendar disappeared from the tool bar. The icon is now located above the search box. How do I get it back to where it belongs?

I have followed all of the instructions by Toad-Hall (as far as I know ) for making categories in my calendar different colors (instead of the small bar at the right).

I have made sure that the legacy is not false I have opened Profile, added folder called chrome, copied the text given into folder called userChrome.css (this was saved as txt, which I changed to css).

I then started Thunderbird and still find that I cannot get full color in my events.

What have I done incorrectly? (I am on a Mac running Big Sur). Thunderbird version is 91.12.0

Thank you for any help.

I'm migrating to a new computer and from Windows 10 to W11. I have successfully exported/imported the contacts using the export tool, but cannot figure out how to ex/im the calendar. I am using a SanDisk drive to move the files. Both systems have TBird 102.1.2 (64-bit).

Please give step-by-step instructions to do the calendar (only) ex/im. I do not use the Mail feature.

When I install Thunderbird 102.1.2. (64) on my Windows 10 PC and install a calender (via net) with a link to my Synology DS220j NAS. Thunderbird shows a turning wheel for hours. In the task manager the "inbox" seems not to run. From then on, I get always the turning wheel when I start TB. I could stopp this by deleting the directory "calender-data" in preferencies and delete the Synology-Calender in TB afterwards. I see this behavior on 2 PCs. The Synology Caldav works fine with Outlook and some Androids. Has/had anyone the same issue and a solution how to manage it?

Have not found a way (yet) to sort or filter my Lightening Calendar Events by an assigned "category ID".

I've also not been able to find an extension or add-on that may address such a capability.

For example: I have a series of medical appointments scheduled throughout an upcoming year or any time-frame. I would like to be able to sort or filter on the category ID that I've created for those appointments.

It is likely possible that I've overlooked an obvious option or even add-on, but so far No Joy.

Creating a "Task" is a possibility, but Tasks will not appear in the Lightening Calendar display.

Any suggestions please?

Hello,

My email host (Epik) recently removed their calendar server, hosting9.epik.com, and switched it over to a new URL. I removed all my network calendars and saved passwords for hosting9.epik.com, and added the new calendars with the new URL. However, every few minutes I get a pop-up (four, actually, one for each calendar account) asking me to provide my credentials for hosting9.epik.com. Of course my credentials no longer work and these modal dialogs block progress until they are all closed via the "X". This process repeats every few minutes and makes Thunderbird virtually impossible to use.

Can you please help me remove any/all references to hosting9.epik.com in my Thunderbird settings? I have removed the saved passwords and calendar accounts, and none of my email accounts' servers (IMAP and SMTP) refer to hosting9.epik.com. If there is somewhere else to look, please let me know. Is there some settings file I can edit on disk to remove these references, that are not available via the GUI settings? If not, I fear this may be a bug causing Thunderbird Calendar to connect to deleted servers.

Thank you!

My calendar is suddenly a day behind on all of its dates, and the time for adding an item to the calendar is off by an hour. Is this just my computer (MacBook Air), or are others having this problem too?

This issue started happening recently. I am using Thuderbird 102.3.1 on Linux. I have recurring events in my Calendar. After the event date passes, I still get the notice with date "Yesterday at ..." When I dismiss the event, nothing happens, it persists. I've cleared my error console, then tried to Dismiss again and I get this in the error console:

Calendar: CalDAV: Unexpected status modifying item to Mark's Calendar: 400 BEGIN:VCALENDAR PRODID:-//Mozilla.org/NONSGML Mozilla Calendar V1.1//EN VERSION:2.0 BEGIN:VTIMEZONE TZID:America/New_York BEGIN:DAYLIGHT TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:EDT DTSTART:19700308T020000 RRULE:FREQ=YEARLY;BYMONTH=3;BYDAY=2SU END:DAYLIGHT BEGIN:STANDARD TZOFFSETFROM:-0400 TZOFFSETTO:-0500 TZNAME:EST DTSTART:19701101T020000 RRULE:FREQ=YEARLY;BYMONTH=11;BYDAY=1SU END:STANDARD END:VTIMEZONE BEGIN:VEVENT CREATED:20191103T202926Z LAST-MODIFIED:20221011T135912Z DTSTAMP:20221011T135912Z UID:992dbfba-20e6-426c-82c9-a5bc8e490342 SUMMARY:Stated Meeting NE4 ORGANIZER;PARTSTAT=NEEDS-ACTION;ROLE=CHAIR:mailto:mfoley@novatec-inc.com ATTENDEE;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT:mailto:someone@novatec-inc.com ATTENDEE;CN=danielagaspari;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT:mailto:someone@yahoo.fr EXDATE:20210809T233000Z RRULE:FREQ=MONTHLY;BYDAY=2MO RRULE:FREQ=MONTHLY;BYDAY=2MO CATEGORIES:NE4 X-MOZ-LASTACK:20221011T135912Z DTSTART;TZID=America/New_York:20191111T193000 DTEND;TZID=America/New_York:20191111T203000 SEQUENCE:2 TRANSP:OPAQUE X-MOZ-GENERATION:88 X-MOZ-SEND-INVITATIONS:TRUE X-MOZ-SEND-INVITATIONS-UNDISCLOSED:FALSE BEGIN:VALARM ACTION:DISPLAY TRIGGER:-PT2H DESCRIPTION:Default Mozilla Description X-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:Got a VALUE parameter with an illegal type for property: VALUE=DURATION END:VALARM BEGIN:VALARM ACTION:DISPLAY TRIGGER:-PT2H DESCRIPTION:Default Mozilla Description X-LIC-ERROR;X-LIC-ERRORTYPE=PARAMETER-VALUE-PARSE-ERROR:Got a VALUE parameter with an illegal type for property: VALUE=DURATION END:VALARM END:VEVENT END:VCALENDAR

CalDavCalendar.jsm:757 NS_ERROR_FAILURE: Server Replied with 400 calCachedCalendar.js:747

What can I do to dismiss these events?

Hi,

Please explain how to open SHARED Google calendars (that I do not own) in Thunderbird 102.4.0 on Win 11 Pro. Here is what I have tried:

(1) Added Google Provider add-in. Attempted to add my Google Calendars. It didn't find anything at all. (2) Removed Google Provider add in. Attempted to add my Google Calendars. It added the ones that I personally own just fine. However, it did not detect my husband's shared calendar to which I have view-only access. Interestingly, it DID add a shared calendar to which I have read/write access. (3) Restarted Thunderbird. Attempted #1 again. Attempted #2 again. (4) Restarted Thunderbird. Attempted #1 again. (5) Restarted Thunderbird. Attempted #2 again. (6) Restarted Thunderbird. Attempted #2. Then attempted #1. (7) No change in results. (8) Swore at the application multiple times. (9) Hit up these forums. Found that I am not the only one with this problem. Attempted to find solution. It was written in tech-ese and not English.

Please explain -- in English -- how to add view-only Google calendars, that I do not own and to which I do not have update access, to my new Thunderbird installation on my new computer. All I am trying to do is view my husband's calendar.

Thank you.

Hi team

I notice an interesting difference in TB's version 102 compared to the former version 91. This is running on Ubuntu 22.04 and at the backend there are only CalDAV based calendars (no local calendar defined). I am using the Today pane with the calendar's upcoming events in the upper part and the tasks below.

When adding a new task via the "click here to add a new task", choosing the name of a new task (i.e. Test3), there is no indication that the task has actually been added. It is not showing this new task in the pane at all (which is clearly different to TB version 91 where that new task appeared in the list).

If I open the task window (tab), I can see the new task is there but I won't see it in Today's pane. In the task window (tab) view I have chosen to show the name of the calendar where each task has been added to and the newly created task is shown in the correct (CalDAV) calendar. The (test) tasks created show a default start date (today 8am) and end date (tomorrow 6pm).

The tasks will eventually appear in the Today pane but I have not paid attention when exactly. I know that they are there next morning when planning my day but right now when testing, neither a manually initiated calendar synchronisation nor even a full Thunderbird restart will show the task. Trying to work in the pane (i.e. change sort order) to do some kind of refresh for the pane does not show the new task(s) either.

Thanks for reading.