I have an iPad Air with the latest iOS 10.2.
The default Apple Calendar app keeps crashing when I select the month view.
I have the same problem on an older iPad with the same iOS.
Your help is much appreciated
-You have two iPads, one is an iPad Air
-Both running iOS 10.2
-iPad Air has Hotmail account setup, the other has no accounts setup
-Are you using iCloud on both iPads?
-Are there a lot of calendar events?
-If using iCloud, do you have a Mac that is also signed in with the same Apple ID? If so, does the calendar app work properly on it?