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I have exported the calendar entries to an ics file. When I try to import them on another PC it fails with an error indicating something about the entries having dismissed an alert and needing to be read only. How do I get around this?

When I first opened Thunderbird (just a few weeks ago), I noticed that some Calendar Tasks were already set up by Thunderbird. (My standalone calendar is Efficient Reminder).

But I don't see options for REMINDERS - popups (preferably) and/or sounds. (The purpose of a calendar for me is to be reminded to do things.)

I searched for options in Thunderbird, and I looked on the information here, but can't find anything.

If I can I select a sound and/or popup to REMIND me, where can I find the option to set it?

It seems that this guide does not work anymore: https://support.mozilla.org/en-US/kb/adding-a-holiday-calendar

The point 5 ("From the Format list, select iCalendar (ICS).") is not there anymore. The wizard shows directly a form where you can enter the "Location", but if you enter the URL of an ICS file, it says "Could not find calendars at this location. Please check your settings."

Is there a different way to add these calendars? (and any other ics calendar you can find on the web)

Thanks

I FOUND no close TOPIC.

Google calendar allows color-coding of events - but the display is highly inadequate. T-bird 128 calendar apparently HAS no option to color events. But events are FAR easier to see WHEN color-highlighted. Would this be a difficult option??

Backgound: I need to keep the display on my windows 11 laptop set at 150%

Problem: when I try to create an event the controls on the pop up screen are off the top of the screen and there is no way to scroll up to them. The only way I can proceed is by temporarily reducing the windows 11 display to 125% which allows the controls to be shown again. I have tried adjusting the Thunderbird density and font size but this makes no difference. As it stands, the calendar is next to useless.

Can anyone suggest a solution.

Please Someone help ?

I have followed all the suggestions I can find, but my Thunderbird Calendar will not sync with the Outlook Calendar on Windows 11. I am using TB Sync, but every time I try to add my Outlook Calendar ? It refuses to accept my Password, even though it is correct, and the User name and email are too ! It shows as error code 401, and cannot authenticate ?

I have tried a suggestion to create an 'App Password' to use in my Microsoft account, but the options described do not exist in my account !

Can anyone please help ?

After an update to Thunderbird around 8/10/24, I can still list future calendar events, but no longer past events. It is very useful for me to list past events. For example, I can quickly find out when I last had a flu shot. Could you restore this ability to print a complete list of past events, as well as future events? Thanks! Carl Lund

Computer crashed. After restoring, Google calendar is not syncing. No error message that I can see. I unsubscribed and resubscribed to no avail. I have no clue what to look for and searching here is not helping as all the references to this are years old. Can someone help me figure out why this is happening?

Somehow I was running an unsupported ver 129 on a Win 10 system, not sure how. I was getting a warning message at startup. I decided to install the latest supported ver 128. I did that over the ver I was running and did not save, export or rename anything. Just one install over the other. I have lost my calendar that I spent months building. Did I lose it? Any possibility it is still around hiding somewhere? Help please, but I am prepared for the worst for being hasty in my decision. Cheers, TR

Hey guys, the client I work for provided my with MS account to be used for communication. Since I am on Linux, these two things doesn't really bond well :) I was using mostly web access for MS Teams and Outlook OWA ...

However, I figured that I would love to try Thunderbird for at least emails (so I got them all my email at one place)...

After some discussion with client's ITHD (after they changed my license to E3 type) I managed to get the email working - so I can send and receive emails ... However, I cannot see the calendar so it's still almost useless for me for I don't see meeting request.

Any idea how to fix that? did any of you guys face the same?

Hi,

Someone sends me a calendar appointment for 11th of May at 16:30-18:30 and another at 18:30:20:30. I accept these appointments. In my calendar, they correctly display at these times.

When I close and re-open Thunderbird, the first appointment is now scheduled for 12th of May, but the second is fine. When I close and re-open Thunderbird again, the second appointment is now scheduled for 12th of May as well.

The times are completely different too.

I'm using Thunderbird 138 from the Arch Linux repositories but I've also tried the Flatpak package to no avail. I've tried setting my Timezone manually and using my System timezone to no avail.

GNOME Calendar, which is also synced to my Caldav server, displays the appointments at the correct day and time. The web interface for my mail server also displays correctly.

It's only Thunderbird that screws it up time and time again.

This has been going on for years and it is driving me insane. I can't use my calendar with Thunderbird because I keep thinking my appointments are at the wrong time!

Send help.

This morning there was an update to Thunderbird. When I reopen the program I can no longer see the right end of the screen. There is no toolbar to scroll over to see that side, and I've been unable to resolve this in the settings. I am using Density > Compact and I do not have any add-ons installed. See screen capture. I will have to stop using TB if this can't be resolved.

Thunderbird 115.1.0. R/W to a Google calendar using Provider.

I cannot dismiss calendar reminders. The Error console message for the failure gives:

rea[calGoogleCalendar] Modifying item [xxxxx] failed:2147500037: {

"error": {
 "errors": [
  {
   "domain": "calendar",
   "reason": "forbiddenForNonOrganizer",
   "message": "Shared properties can only be changed by the organizer of the event."
  }
 ],
 "code": 403,
 "message": "Shared properties can only be changed by the organizer of the event."
}

}

I saw an archived question outlining this exact problem (well, the exact error, not sure if it was with Provider/Google), but there didn't seem to be any resolution provided. I believe that I am not the event organizer for many, if not most, if not all, of the events for which I'm trying to dismiss the reminders, but I'm simply trying to dismiss a reminder. Some of the events are recurring, others are singles - it doesn't seem to make a difference.

Grateful for any help; I'm sitting at about 70 reminders I cannot dismiss.

Hi,

Scenario: I have a custom domain with an email address, and have used mailbox.org and currently icloud to host my email. In both cases, the email address associated with my custom domain is the only one I use for everything, such as email, calendar, contacts, etc (x@er.com). Also in both cases, there is also a login email address to the email hosting service (i.e. x@mailbox.com and x@icloud.com respectively).

Issue: My calendar invites erroneously send from my icloud email address, rather than my custom domain email address. This appears to be by defaul and unchangeable. See 1/2 screenshot.

Settings: I'm on W11 Pro, using TB 115.10.1 (64-bit). For calendar settings, see 2/2 screenshot.

Background: With both providers, my calendar invites initially were being sent from the correct email address (x@er.com), but inexplicably switched to the being sent from login email address of the email hosting service after some time (about a year with mailbox.org, and a couple of months after migrating to icloud.com). This messes up my calendars, and I need to resolve it. Hopefully it's just something dumb that I'm doing.

What I've tried: On mailbox.org: When the issue first occured I put up with it for a few weeks then assumed it was probably mailbox.org and migrated to icloud. This appeared to resolve the problem at the time. On icloud, my calendar sync was setup in TB using add-ons, which worked for a couple of months and then the issue recurred. I've tried: 1. In apple account settings: I tried changing my apple-id to be my custom domain email address, rather than my icloud email address (didn't fix it). 2. I then unsubscribed from all of my network calendars in TB, removing the addons and restarting TB, as per https://support.mozilla.org/en-US/questions/1406255#answer-1568028 - I had to add a blank local calendar first before I was able to remove all of the network calendars. 3. I then added my calendars back into TB by using the direct URL locations, as per https://support.mozilla.org/en-US/questions/1406112 - when adding the calendars back, I tried using the login as both my custom domain email address, and also my icloud email address (didn't fix it).

Any help would be much appreciated.

Thank you.

Hello,

I am getting old, my vision is much weaker than it used to be and now I have what is commonly referred to as "Eye Floaters." There's nothing that can be done to fix that, but with dark themes I can usually not see them. Due to a bug (or feature, if you prefer) in the Windows 10 Scaling and Layout settings, once you change them, there's no going back, at least that I have found. Low vision forced me to try to increase the font size in Windows, and in the (seemingly irreversible) process, I set Scaling to 150%. That fixed the problem of text being too small, but it also affected many programs in a negative way. Everything is waaay too big. For example, the menu bar and overall page header in Firefox was massive, taking up nearly a third of the top of my monitor screen. It did the same thing in Chrome only worse. The page footer was almost as big and between the two it left about two inches in the middle to view a website's content. This was very annoying to say the least.

I found a fix for Firefox, by changing the ui.textScaleFactor to 100. However, that did not work for Thunderbird. I found a way to fix it, by going back to Thunderbird 102, and now the email and address book are fine, and the calendar works fine, except for the colors with really bother me. I can't read the screen without looking away to the right of the screen. This is because the colors are too bright, and that is in a dark theme. I don't even want to look at a light theme. It would probably blind me.

Here's what I have. The 1st image is what it looks like, and the 2nd is what I would like to make it look like. Is it possible to do that? Please excuse the low quality color replacement on the 2nd image...

Hi, I use new version 115.1.0. When creating calendar event and adding attendees, they don't get the invite and I don't see the message that sent in sent items folder. Please assist

In Outlook you can forward an appointment that is not created by yourself to someone else. In Thunderbird this option seems not available, or is it? Adding attendees to an event that you did not create yourself does not work.