firstDayOfWeek
FirstDayOfWeek refers to the day on which a calendar week begins. It is a convention that varies by locale, culture, and software, and it can influence how weekly ranges are displayed, how week numbers are assigned, and how scheduling interfaces organize dates.
Across standards and regions, different days are used as the first day of the week. The ISO
In computing and software, firstDayOfWeek is exposed through locale data and configuration options. Examples include: Python’s
The choice of first day impacts week numbering, fiscal or academic calendars, and user interfaces. While ISO