Birthday Calendar Duplicated on iOS 10

   Rated (5.0 of 5.0) by 2 reviewers.
Kelly Heffner Wilkerson

Categories: iTunes, iPhone | View Comments

iOS 10 issue where the Birthdays calendar appears many times in the iPhone calendar list.

We recently were alerted to an interesting iOS 10 glitch where after updating to iOS 10, calendars are duplicated, sometimes hundreds of times. Some of the duplicated calendars can be deleted manually, but some are interpreted as a “Birthdays” calendar which can not be deleted on the iPhone. This issue also affects iPads and iPod Touches.

This issue is visually bothersome, but can also be an issue if it's triggering excessive calendar syncing.

Working with a customer (thanks Dean!) we were able to get rid of the duplicate calendars by restoring a backup of the iPhone that does not contain the calendar database files. We've created a custom build of our Decipher Backup Repair software that will remove calendar files as part of the repairs done to an iOS backup. Then, after restoring this filtered backup, you sync your calendars back as normal.

If you want to use Decipher Backup Repair to fix this duplicated calendars glitch, you'll need a custom version of Decipher Backup Repair (our normal public build does not remove calendar files ☺)

Update November 10th, 2017: This issue is much less common in iOS 11, so we've stopped maintaining public links to the "birthday calendar bug version" of Decipher Backup Repair. Please contact us and mention this blog post and we'll build you a custom version of Decipher Backup Repair appropriate to fix the calendar issue.

You use this custom version of Decipher Backup Repair to fix the duplicate calendar issue as follows:

  1. Make a backup of your iPhone, iPad, or iPod Touch in iTunes.
  2. Run this custom version of Decipher Backup Repair on the backup, to create a "Decipher Repaired" backup.
  3. Restore the "Decipher Repaired" backup.

Your calendars will then be completely re-fetched with the contents in iCloud, your email servers, etc.

One footnote: Please, while you're making this backup do not cancel your backup early in iTunes. In iOS 10, we've seen a pretty nasty issue where encrypted backups are corrupted by canceling the backup early. Likewise, if you see notes about incorrect encryption in Decipher Backup Repair, stop and contact us and we'll help you make a fresh backup from scratch.

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  • Craig Bergman

    Craig Bergman February 2, 2017

    Best $30 I ever spent. Worked Instantly. My 7+ was such a dog it would crash and become unresponsive while draining the battery in minutes. Now its snappy and very responsive. I will report back on if Calendar continues to use 50% of my battery per day or not in a week or so.

    • Kelly HW

      Kelly HW February 2, 2017

      Great news Craig! I'm still actively tracking this issue to see if I can help determine the original cause and help prevent it.

      • Craig Bergman

        Craig Bergman March 3, 2017

        And they are all back and a few NEW problems. Now there are 100 generic calendars at the top in addition to hundreds of birthdays. I noticed because battery life started to suck again. Does your app fix this too? Will Apple ever get serious about this bug with calendars? For a billion dollar company they have bugs worse than kickstarter wannabees.

        • Kelly HW

          Kelly HW March 3, 2017

          The "calendar" version DBR should fix this as well, since it purges the stored calendar data to force the iPhone to download fresh from iCloud. If you want to shoot us an email too, I'd love to know the specifics of your calendar setup so I can try to replicate it on my own phone to try to have the bug myself to dig into ;)

  • Mimi

    Mimi December 12, 2016

    Oh Decipher guys - I want to almost cry. This has cost me so much money to try to repair and Apple were totally rotten and didn't care at all.

    • Mimi

      Mimi December 12, 2016

      And now, I am actually teary - out of the relief from this frustration. Thank you SOO Much.

      • Kelly HW

        Kelly HW December 12, 2016

        Aww! Mimi! We're so glad we could help! Thank you for the kind words and for taking the time to share!

  • Chris Koss December 12, 2016

    THANK YOU, THANK YOU, THANK YOU!!! You tool is the ONLY way to currently fix this birthday calendar bug short of a complete wipe and start over... LIFESAVER (not literally, but close :) ).

  • Brett Lykins

    Brett Lykins December 12, 2016

    Thanks for the great tool! Solved the "Birthday Calendar Madness" issue for me and saved me from doing a complete wipe of my phone.

    • Kelly HW

      Kelly HW December 12, 2016

      Hi Brett,
      Thanks for the positive feedback -- I'm glad you're free from the calendar madness! :)