Delete a calendar on iCloud.com

When you delete a calendar on iCloud.com, all events associated with the calendar are also deleted.

You can’t delete all of the calendars in the list because the iCloud Calendar list must always contain at least one calendar.

WARNING: When you delete a calendar, it’s deleted from every device with Calendars turned on in iCloud settings.

Go to icloud.com/calendar, then sign in to your Apple Account (if necessary).
Tap the calendar you want to delete in the sidebar.
Tip: If you don’t see the sidebar, tap below the calendar.
Tap , then tap Delete Calendar.

If you accidentally delete calendars or events, you can restore an archived version of your calendars. See Restore your calendars and events on iCloud.com.

מועיל?

iCloud.com User Guide for iPad