GetLocaleInfoEx, GetCalendarInfoEx, EnumCalendarInfoExEx can be called directly now.
Many years ago we checked those functions to support Windows versions older than Vista without those functions, but this is most likely not needed any more these days.

See
https://learn.microsoft.com/en-us/windows/win32/api/winnls/nf-winnls-getlocaleinfoex
https://learn.microsoft.com/en-us/windows/win32/api/winnls/nf-winnls-getcalendarinfoex
https://learn.microsoft.com/en-us/windows/win32/api/winnls/nf-winnls-enumcalendarinfoexex