all Python 3calendarfunction

calendar.setfirstweekday()

first weekday

Sets the global first weekday for the module-level functions: month(), monthcalendar(), weekheader(), prcal() and the rest.

Syntax

calendar.setfirstweekday(firstweekday)

The setting changes for the whole process, not for a single call — it is often cleaner to create your own TextCalendar(firstweekday=6). Class instances and weekday() ignore it: weekday() always counts Monday as zero. A number outside 0–6 raises IllegalWeekdayError; write calendar.SUNDAY for Sunday, not 7.

Examples

import calendar
calendar.setfirstweekday(calendar.SUNDAY)
print(calendar.weekheader(2))  # → Su Mo Tu We Th Fr Sa
print(calendar.monthcalendar(2024, 2)[0])  # → [0, 0, 0, 0, 1, 2, 3]
print(calendar.Calendar().firstweekday)  # → 0 — экземпляр не затронут

See also

Common errors

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