Thanks, Rick. Yes I am using the cloud. However, as a matter of routine, when I sync my iPhone or iPad I save the back up on the desktop. The missing calendar is only seen on my iPad. Not only is it not showing up on my desktop, it is unlike the other calendars in that I cannot edit anything on the iPad. Instead of the typical "Edit" button I get a button labeled "Details." The only thing that I can change is "Availability," e.g., Free or Busy. Another curious thing is the Calendar name is "inbox."
For three other calendars the edit function works correctly and changes or additions update on other appliances almost instantaneously!
It appears that somewhere / somehow this calendar which goes back to 2007 has been corrupted. Is there any way to restore it or is it gone for all practical purposes?
Thanks for confirming my approach.
I have tried your approach. I have a calendar with the most recent and future events; it is visible on all appliances; and, it syncs to the cloud without issue. I think I will wait for a very rainy day to transcribe five years of past events.
BTW, the corrupt calendar cannot be deleted from the iPad using any normal appoach; additionally, the events cannot be edited or modified except as described above. I will follow up with Apple but this calendar predates the iCloud and apparently there are known issues in moving those calendars to the cloud.
I tried restoring the calendar folder from Time Machine. It loaded initially, at least for the month I was watching as it loaded, and then deleted it again. So, the calendar I want to display still exists but is not accessible.
Thanks for your time and help. If I learn any more from Apple, I will pass it along.