https://devblogs.microsoft.com/oldnewthing/20090306-00/?p=18913 https://devblogs.microsoft.com/oldnewthing/20090306-00/?p=18... Windows uses the Gregorian Cale

https://devblogs.microsoft.com/oldnewthing/20090306-00/?p=18913 https://devblogs.microsoft.com/oldnewthing/20090306-00/?p=18... Windows uses the Gregorian Calendar as its epoch.