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According to the documentation the default for the argument firstDayOfWeek should be Day.Sunday!
October 31st, 2010 was a Sunday but Date.DayOfWeek(#date(2010,10,31)) returns 6.
Has this argument somehow been localized? Here in Germany the week starts on Monday, thus 6 would correctly represent a Sunday for Day.Monday.
Date.DayOfWeek(dateTime as any, optional firstDayOfWeek as nullable number) as nullable number
dateTime: A date, datetime, or datetimezone value from which the day of the week is determined.
firstDayOfWeek: A Day type representing the first day of the week for this calculation.
Solved! Go to Solution.
The documentation is incorrect.
It is the first day of the week according to your regional settings in Windows.
You may consider always specifying the first day of the week instead of relying on the default.
= Date.DayOfWeek(#date(2018, 10, 23)) = Day.Monday
TRUE
And I thought it is tuesday already
The documentation is incorrect.
It is the first day of the week according to your regional settings in Windows.
You may consider always specifying the first day of the week instead of relying on the default.
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