"Put simply, a bug subsequently dubbed #Y2K22 (named in the style of the Y2K bug that spooked the world starting about a quarter century ago) caused the software to be unable to handle the date format for the year 2022. #Microsoft ’s fix? Set the date on malware detection updates back to the fictional December 33rd, 2021" https://www.welivesecurity.com/2022/02/21/integer-overflow-how-it-occur-can-be-prevented/