Calendars events totally vanish

[blackxacto]

19,1 iMac Sonoma 14.2:

I hit some key stroke combination in Calendar app and POOOOOF my Calendars became completely blank. I had to restore iCloud Calendar backup to Dec 9th. It was the latest one available, so everything i added after 9th are gone. What the hell key combination Trashes the entire Calendar history?

AND WHY was icloud Calendar backups stop at Dec 9th?

 

[NoBoMac]

AND WHY was icloud Calendar backups stop at Dec 9th?

Guess: that was last time you made a change to a calendar? But that does not jive with the comment that you've modified calendars post 9th.

(ADD: or do you have an "On My Mac" calendar section or non-Apple calendar? Those do not get backed up via iCloud)

My backup are all over the place, but does seem to correspond to days I've added, deleted, changed an event in my calendars. And the backup is always at the same time of day, 3:59pm.

 

[blackxacto]

Its all so strange, i had made a couple of new entries in the calendar after Dec 9. It makes no sense.