How to restore deleted calendar?

Hello bb153,

Just to clarify, was the calendar deleted from the device directly, or iCloud?

If you accidentally deleted your calendars from iCloud, please check out this link for information on what to do to restore your calendars from an earlier version: If you accidentally deleted your calendars, bookmarks, or contacts from iCloud

Restore your calendars from an earlier version 

Several things happen when you restore an earlier version of your calendars. 

• Your sharing settings get erased. You can share the calendars again, or you can ask the owner to share them again.

• iCloud cancels and recreates all of your upcoming, scheduled events, then resends the invitations for you.

To restore your missing calendars: 

1. From your iPad or computer, sign in to iCloud.com.

2. Click your name at the top of the iCloud.com window, then click Account Settings.

3. Scroll down to the bottom of the page. Under Advanced, click Restore Calendars.

4. Click Restore next to the date before you deleted your calendars. 

5. Click Restore again to confirm. After the restore completes, you'll get a notification on iCloud.com and an email to the address on file with your Apple ID.

If you use multiple calendars on iPad, and one was removed and you want to set it back up, this page explains how to manage and add calendars: Set up multiple calendars on iPad

Thanks!