Remove Icloud Calendar. Locate icloud, click uninstall, then follow the onscreen. You will now see a list of all the default enabled holiday.

Work, calendar, home, and family. You will now see a list of all the default enabled holiday.
When You Delete A Calendar From Your Calendars List, All Events Associated With The Calendar Are Also Deleted.
I was able to remove the icloud calendar from my windows 7/outlook 2010 installation by turing off calendar sync on the icloud control panel on my pc.
Work, Calendar, Home, And Family.
Navigate to the settings app on your iphone and tap calendar.
You Can Rename Or Delete Them, But You Must.
Images References :
Do This If Calendar Events Won’t Delete On Iphone 1.
Of course if you rely on that calendar,.
Activation Lock Is A Security Protocol That Can't Be Bypassed.
Open the calendar app on your iphone or ipad.
Hi Helpmenowplease01, Thanks For Contacting Apple Support Communities!