iOS 11.2 Update, Fixed Due Bug
On Saturday, Apple released the iOS 11.2 update, fixing the crashes some users were experiencing, since the date rolled over to December 2. The date bug started after 12:15 AM on December 2nd and caused some iPhones, iPads and iPod Touch's, to repeatedly crash and restart, if certain apps using local notifications were installed.
If your device was affected by the bug, here's a support link from Apple, on what to do: Apple Support Article
Some of the other new features included in the iOS 11.2 update are; Apple Pay Cash, the new peer-to-peer payment system, allowing iOS users, to send and receive funds, via iMessage. Faster 7.5W wireless charging, for iPhone 8, iPhone 8 Plus, and iPhone X users, and a Now Playing content controller, for the Apple TV.