Skip to main content

Date.WeekOfYear

Returns a number from 1 to 54 indicating which week of the year this date falls in.

Syntax​

Date.WeekOfYear(
    dateTime as any,
    optional firstDayOfWeek as Day.Type
) as number

Remarks​

Returns a number from 1 to 54 indicating which week of the year the date, dateTime, falls in.

  • dateTime: A datetime value for which the week-of-the-year is determined.
  • firstDayOfWeek: An optional Day.Type value that indicates which day is considered the start of a new week (for example, Day.Sunday). If unspecified, a culture-dependent default is used.

Examples​

Example #1​

Determine which week of the year contains March 27th, 2011.

Date.WeekOfYear(#date(2011, 03, 27))

Result:

14

Example #2​

Determine which week of the year contains March 27th, 2011, using Monday as the start of the week.

Date.WeekOfYear(#date(2011, 03, 27), Day.Monday)

Result:

13

Category​

Date