iPhone and iPad – remove Hebcal Jewish calendar (without iCloud)

To remove a Hebcal calendar from your iPhone or iPad that was subscribed directly from the iOS device, follow these steps:

1. Go to the Settings app, then touch Mail, Contacts, Calendars.
2. Tap Subscribed Calendars:
   
3. Tap the Hebcal calendar that you wish to remove from the list of subscribed calendars:
   
4. Scroll to the bottom of the page, and tap Delete Account
   
5. Tap Delete Account again to confirm.

See also: iCloud – remove Hebcal Jewish calendar