calendar-week-start-daycalendar-week-start-day is a variable defined in `
calendar.el'. Its value is
0Documentation: The day of the week on which a week in the calendar begins. 0 means Sunday (default), 1 means Monday, and so on. If you change this variable directly (without using customize) after starting `calendar', you should call `calendar-redraw' to update the calendar display to reflect the change, otherwise movement commands will not work correctly. You can customize this variable.