Examples
WEEKDAY("1/1/2019") : 3
INDEX(LIST("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"), WEEKDAY("1/1/2019")) (Text): Tue See also: INDEX(), LIST()
WEEKDAY(TODAY()) : Today's numeric day of the week. See also TODAY().
(TODAY() - WEEKDAY(TODAY())) : Date of Saturday last week.
(TODAY() - WEEKDAY(TODAY()) + 6) : Date of Friday this week.
(TODAY() - WEEKDAY(TODAY()) + 7 + 4) : Date of Wednesday next week.
([Weekday] - WEEKDAY(TODAY())) : Offset of this week's [Weekday] (1 = Sunday, ..., 7 = Saturday) from today (e.g., 0 = today, -1 = yesterday, 1 = tomorrow).
(TODAY() + ([Weekday] - WEEKDAY(TODAY()))) or (perhaps more intuitively) (TODAY() - WEEKDAY(TODAY()) + [Weekday]): Date of [Weekday] within the current week.
([Date] + ([Weekday] - WEEKDAY([Date]))) or ([Date] - WEEKDAY([Date]) + [Weekday]) : Date of [Weekday] within a week containing [Date].
MOD(([Weekday] - WEEKDAY([Date]) + 7), 7) : Offset of the [Weekday] on or after [Date]. See also MOD().
MOD(([Weekday] - WEEKDAY([Date]) - 7), 7) : Offset of the [Weekday] before or on [Date].
([Date] + MOD(([Weekday] - WEEKDAY([Date]) + 7), 7)) : Date of the first [Weekday] on or after [Date].
([Date] + MOD(([Weekday] - WEEKDAY([Date]) - 7), 7)) : Date of the first [Weekday] before or on [Date].
([Date] - DAY([Date]) + 1) or (EOMONTH([Date], -1) + 1): Date of the first of the month containing [Date]. See also DAY(), EOMONTH().
(([Date] - DAY([Date]) + 1) + MOD(([Weekday] - WEEKDAY([Date] - DAY([Date]) + 1) + 7), 7)) : Date of the first [Weekday] of the month containing [Date].
(EOMONTH([Date], 0) + MOD(([Weekday] - WEEKDAY(EOMONTH([Date], 0)) - 7), 7)) : Date of the last [Weekday] of the month containing [Date].
((([Date] - DAY([Date]) + 1) + MOD(([Weekday] - WEEKDAY([Date] - DAY([Date]) + 1) + 7), 7)) + (([Ordinal] - 1) * 7)) : Date of the [Ordinal]-th [Weekday] of the month containing [Date].
Syntax
WEEKDAY( when )
Arguments
when (Date or DateTime)
Return Value
Number: The day of the week as a number (1 to 7; 1 is Sunday) if when contains a recognizable date, or 0 if not (i.e., if the input is invalid).