deleting list in Reminders deleted my calendar

Update: this morning it had randomly reverted, and the calendar archive I exported wouldn't work anymore... So I called Apple support, they answered right a way, didn't try to charge me, spoke crystal clear English, and told me how to restore it in about 60 seconds. So sorry about that windows comment Apple, I take it back ;-) (still irritated about the original issue though, but knowing this solution makes me feel much safer).

If you accidentally deleted your calendars, reminders, bookmarks, or contacts from iCloud - Apple Support

It happened to me today, November 2017… Unbelievable.

I tried time machine but it didn’t work. Fortunately I had a different machine, a MacBook Pro, I opened it up and quickly took it off Wi-Fi, exported the calendars, put it back on Wi-Fi and watched my work calendar disappear one more time, but then imported the file I have just created and that fixed it… One step closer to going back to windows…

Here’s an idea Apple: no more glitzy new features until the basics work right.

You have a backup, right?

alexanderjebradley wrote:

Not unless Apple backs it up automatically.

Backup is your responsibility, it's your stuff to lose.

Login at www.icloud.com and see if anything survived the deletions. And get yourself a backup system of some kind, Apple is many things, a Fairy Godmother is not one of them.

iCloud does not sync, you took the wrong decisions when you activated it (it is a Dav rather than sync system)

Is www.iCloud.com empty or not?

Is your iPhone/Pod/Pad empty or not?

And do you sync via a cable also?

By 'it' I'll assume you mean icloud.com, what about other devices connected to the account (iPhones etc)

It should be possible to get the data back from your iPad, however I am not the iPad expert. Repost in the iPad forum and ask the posters there. Until then I would not attach the iPad by cable or wi-fi to do a local sync with iTunes.

No sarcasm intended here, try to be aware of your sync paths (makes finding conflicts easier) and a having backup is the only way to ensure that you will not lose your stuff, things break, get lost, get stolen, all hard drives will fail, the only question is who owns the computer when they do.

I hope this can be fixed for you.

Just don't open iTunes while the device is plugged in, and you can do an instant backup of what is left in Calendar and Contacts by opening the apps and going to File>Export, choose vCard format for Contacts (select all cards) and Calendar archive for Calendar

I had the same problem. In fact, it's not us that have the problem, it's Mountain Lion. The dialog contradicts itself, and it caused some horror as I realized my calendar events were gone.

I was able to recover my old iCal events by going back to a pre-mountain lion backup in Time Machine (you need to do option-Go from the menu to view Library in the Finder window before entering Time Machine) and copying my old iCal library entries to the desktop and replacing the calendar entries in the Library with those files, but it seems that Mountain Lion no longer supports entering pre-Mountain Lion backups in time Machine, which might mean you're SOL.

Another horrific bug in Mountain Lion. My condolences. Nothing ***** quite as much as losing your calendar events due to no fault of your own (trusting the OS X too much).

Hey. I solved the problem by restoring the ~/Library/Calendars folder with Time Machine on MacBook. Hope this helps you.