Date.StartOfWeek

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Syntax

Date.StartOfWeek(dateTime as any, optional firstDayOfWeek as nullable number) as any

About

Returns the start of the week that contains dateTime. dateTime must be a date, datetime, or datetimezone value.

Example 1

Find the start of the week for Tuesday, October 11th, 2011.

Usage

Date.StartOfWeek(#datetime(2011, 10, 11, 8, 10, 32))

Output

// Sunday, October 9th, 2011
#datetime(2011, 10, 9, 0, 0, 0)

Example 2

Find the start of the week for Tuesday, October 11th, 2011, using Monday as the start of the week.

Usage

Date.StartOfWeek(#datetime(2011, 10, 11, 8, 10, 32), Day.Monday)

Output

// Monday, October 10th, 2011
#datetime(2011, 10, 10, 0, 0, 0)