Normally Apple comes out with their updates during the week but this latest iOS update came out on Saturday. Have you upgraded to it yet? It introduces Apple Pay Cash which doesn’t seem to be active yet and also some bug fixes. I’m guessing the reason that it may have gotten pushed out on Saturday is because of a date bug that would send the devices into a reboot loop.
As always remember to back your device up before doing an update
AppleInsider has more here