iCal events disappeared; IMac Monterey 12.6.4.
Single-occurrence iCal events have disappeared from my Home calendar on my iMac (Monterey 12.6.4). Repeating Home events are still showing. The problem is the same on my iPhone 13.
iMac 27″, macOS 12.6
User profile for user:
Sheree_P
User level:
Community Specialist
Hey vjohnso,
We recommending checking the iCloud website: iCloud. If you see the missing events on the website you may be able to restore the events. To do so, follow the steps below: You can restore your calendars and events (along with your reminders and reminder lists) from an earlier version that was automatically archived in iCloud.
"If you have shared calendars, all sharing information is removed when you restore them. You have to share your calendars again, and ask other people to reinvite you to share their calendars.
- If you don’t have shared calendars, go to the next step.
If you do have shared calendars, write down which ones you’re sharing, who you invited to share each one, and whether each participant can view and edit or only view. Also note which calendars other people are sharing with you.
2. On iCloud.com, click 
in the toolbar, then click Data Recovery.
3. Click Restore Calendars.
Available versions are listed by the date and time they were archived.
4. To the right of the version you want to restore, click Restore.
There may be more versions than can be displayed. Scroll to see them all.
Note: Wait until iCloud finishes restoring your calendars before you change them. During the restore process, any changes you make aren’t saved.
5. If you had shared calendars, reshare them and ask other people to reinvite you to share their calendars and reminder lists. See Share a calendar on iCloud.com.
The restored calendars and events appear on all your devices with Calendars turned on in iCloud settings.
If you change your mind, you can restore the calendars and events you were using. Just follow the steps above to restore the most recent version available."
This information is also in this article: Restore your calendars and events on iCloud.com
Hope this helps. Take care.