> Serve the billions of people who don't use the Gregorian calendar or who live in areas that don't match your idea of time zones. There isn't that much use of

> Serve the billions of people who don't use the Gregorian calendar or who live in areas that don't match your idea of time zones. There isn't that much use of non-Gregorian calendars in software, even in places that do make use of them. And if you do support them, it's another source of bugs, as you have to deal with new Japanese era names and the like: https://blogs.msdn.microsoft.com/shawnste/2018/04/12/the-japanese-calendars-y2k-moment/ https://blogs.msdn.microsoft.com/shawnste/2018/04/12/the-jap...