Undeleting Calendars
You may undelete previously deleted calendars by pressing the
undelete icon 
from the
Calendar Manager screen.
See the Deleting Items help page for more information on deleting and un-deleting items.
There is no confirmation screen when un-deleting calendars. The un-deleted calendar will simply become the active calendar.
You may not undelete a calendar if the un-deletion would cause more calendars to exist than your license allows.