Feature Request: Option for Sunday to be first day of week

[blender0]

The full month calendar currently displays columns starting with Monday (M Tu W Th F Sa Su), Sunday is actually the first day of the week (at least in some countries) where calendars usually display Su M Tu W Th F Sa. Requesting an option be added to make Sunday the first day of the week (and first column) vs. Monday.

[marksie1988]

This is already a feature:
firstDayOfWeek: 1, // default 1 - monday