My seasons keep randomly changing midweek.

Seasons will display on the calendar as spring ending Wed and Summer starting Thur. Sometimes it will randomly change so it'll be last day of winter on the tuesday and then wednesday will say day 3 of spring. It also means that I keep having holidays appear again and again (I think I've had New Year's Eve for 3 sim days straight.) This has affected other events in the calendar like the starlight accolades should be Sun 7PM but instead they're tuesday 4:48PM.