Q: icalendar appointments have been deleted by mistake, both past and present.  My time machine has been off.  How can I get back my appointments?

Greetings JerseyShoreGirl28,

Welcome to the Apple Support Communities!

I understand that your Calendar information seems to have been deleted. If you were using iCloud Calendars, I would suggest looking for your information on the iCloud website as described in the attached article. The article also has some other steps I would recommend working through to see if you can locate these iCloud Calendars. 

Get help using iCloud Calendar - Apple Support

Cheers,

Joe