December 2 "respring" Clock/Reminder restarting/overheating iPhone bug

"Best viable workaround is to turn off third-party notifications. If you’re not sure which apps employ local, repeating notifications, turn them all off."

From this article linked by MacSchr:

December 2nd is making some iPhones soft reset

I'm sure Apple will release an official fix soon.

"If you cannot disable your notifications, then temporarily roll back your date and time to 1 week ago, this will enable you to disable your notifications and then you can return to the current date and time without glitches."

Also

• Disable Background App Refresh (Settings > General)
• Settings > General > Reset > Reset All Settings (use as last resort, or just wait for a fix and play outside)

(tips by https://www.reddit.com/user/bedwej)

https://www.reddit.com/r/iphone/comments/7gzntq/psa_iphone_rebootrespring_issues _megathread/

Failing that, a drastic solution is as follows and it's always a good idea to do a backup:

I've been suggesting this in other discussions if Reset All Settings doesn't work.

First backup:

How to back up your iPhone, iPad, and iPod touch(Document Type: Document) Nov 30, 2017 Before you get started, learn the difference between iCloud and iTunes backups, then choose the method that's best for you. If you need an alternative backup, you can make one in iCloud and another in iTunes.https://support.apple.com/en-us/HT203977

Then restore:

Restore your iPhone, iPad, or iPod touch from a backup(Document Type: Document) Nov 7, 2017 Restore from an iCloud backup Restore from an iTunes backup https://support.apple.com/en-us/HT204184

You will need to know your iPhone/iPad pin number and your Apple ID/password to do it. It's a full restore, but will end up the same as before hopefully without the December 2 2017 Oceania Bug.