If it's a network (CalDAV or other, such as Google Calendar), you can create a new calendar attached to it and all your events will be there. If it was a local calendar on the old computer, you can import it from your old Profile. Please describe your situation in more detail and we can give you some advice on how to do it.

Thank you, Lin. I have always backed up my Thunderbird profile in the way I learned right here on this help board. I back up to a jump drive. The calendar is local and on my profile and nowhere else. I did try to look at the calendar, but my computer skills are not enough. If you can walk me through how to get the info out of my profile and back into Thunderbid, I would be beyond thrilled!

What I cannot understand though is why all my emails are just fine as imported from the backup and the calendar is not. I may not need to know why, but I like to understand the why of things.

For the record, I am an old woman who started using a computer for work in 1985. This is probably before you were born. Insert shock emoji here.

A question for the future: Would I be better off using a Google calendar? I tried the calendar on my iPhone and hated it as clumsy and awkward. My all time favorite calendar was the Windows 95 shareware calendar from the UK. I am still able to display that on our Windows 11 computer, but I don't really use it anymore. I liked that I could print a month if needed. Thunderbird might do that, but I have not been able to see how.

OK. This assumes you have a full, un-zipped copy of your old Profile accessible on the jump drive or wherever. If it's a zipped file, made with Thunderbird's Export/backup tool, let me know - I don't personally use that, and the recovery procedure is a little different. Make a note of its location. Then in your current Thunderbird setup...

- From the Tools menu choose "Import..." to bring up the Import Tool.

- Choose "Import from another Thunderbird installation, then press the Continue button.

- Choose "Choose a profile folder". This will bring up a dialog box to let you navigate to the old Profile and select it. Click Continue.

- The next dialog box, "Import from a Thunderbird profile, gives you the options to import various things. Unselect everything but "Calendars". Click Continue.

- In the next dialog box, confirm that you are about to import Calendars and click "Start Import."

- The next dialog box will tell you that the import is Complete and when you click "Finish", Thunderbird will restart.

- After the restart, all you calendars should be there!

Please let me know how it goes, or if you're operating from a zipped backup.

(p.s. - I think we're contemporaries!)

A question for the future: Would I be better off using a Google calendar? I tried the calendar on my iPhone and hated it as clumsy and awkward. My all time favorite calendar was the Windows 95 shareware calendar from the UK. I am still able to display that on our Windows 11 computer, but I don't really use it anymore. I liked that I could print a month if needed. Thunderbird might do that, but I have not been able to see how.

As for using Google Calendar, the advantages are that you can view and edit it from multiple devices, like you phone and other computers. A negative for me is that the Thunderbird Calendar has some notorious issues with event notifications from Google Calendars - they often can't be dismissed. This seems to not affect everybody, but it does me and others who have complained here. It's been going on for many years and seems unlikely to be fixed. The workaround is to disable notifications for that particular calendar. Also, I personally find the Thunderbird Calendar interface to be cluttered and unfriendly. I do have the Google Calendar installed in Thunderbird, but for day-to-day use I view it in my web browser. So, my answer is, yes, use Google Calendar, just be aware of its quirks.

Lin, I gathered up my courage and began using your instuctions for the calendar. I hit a snag when I got to Choose a Profile folder. Instead of the dialog box that you mentioned, I got a church related folder. I tried various things. Then, I inserted my backup that I ran before the big changover to a new computer. and then took a literal picture of the screen. (I can do a screen shot on my phone, but have forgotten how to do that on the desktop,) The picture shows the insides of the folder marked Calendar on the backup. It does not look promising. I do not think the backup is a zip file. As I was able to open this folder and locate the subfolder Calendar, then I think it is not zipped.

Here is the name of the backup file as a whole geeqmnbz.default-release

If/when I can get the calendar to work, I think I shall try the Google calendar. I would LOVE to see my calendr on my phone, but th iPhone calendar is so awkward to use.

You hve been great. Thank you for your patience.

I think I see where the process is going off track - you're up one folder level too high. You want to be in the folder that CONTAINS the folder you're in, that is, the one that contains the "calendar-data" folder. Go down a level and you will now be in your backup's main Profile folder. It should look something like the attached image, probably less cluttered. NOW press "Continue" and you should be presented with the next prompt, to select Calendars only.

I noticed where I went wrong. Problem still not solved, but I did overlook one word in your original inistructions. When I chose Choose a Profile Folder, I failed to navigate anywhere. Today, I did navigate to the jump drive and then everything you said appeared as it should.

When I clicked Finish, Thinderbird did not restart. I restarted manually. The calendar was still not there. I restarted the whole computer. Still no dice.

I am not sure that I know a zipped file from a hole in the ground. I remember downloading a zipped music file once and it was clearly marked. I don't see anything like that.

I really need to have our local computer guy come here and do couple more things. I believe the things you have said may help him discern where I went wrong. So, your efforts were not in vain. Thank you so very much!

This is for the long suffering Lin who has been so helpful. Our regular computer guy came here and got it all fixed, both lost bookmarks and lost calendar. He determined that the calendar just was not being copied when I backed everything up the way I had done it for years. He copied everything from our old computer which is still here and then extracted just the calendar. It is all there and I am so relieved. He then made a desktop folder with the file name. I am to use that to make backups from now on insead of the old method. His version had 32 GB while my backup had only 20 GB. I have found one oddball trash file that will help pare down the size.

Thank you for al your help. It wasn't wasted. I have learned a lot.