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Returns the day of the week (1 through 7) for the specified date. By default, the function starts counting on Sunday (1 = Sunday, 2 = Monday, and so on). For example, the function returns:

  • 1 for Sunday, January 1, 2012
  • 2 for Monday, December 31, 2012


weekday(date, [week_start_day])

  • date can be any of the following:

    • Another function that returns a date.
    • A formula column that returns a date.
  • week_start_day (optional): A number indicating whether weeks start on Sunday or Monday. Valid values are:

    • 1: (default) Days are counted from Sunday. The value of Sunday is 1, and the value of Saturday is 7.
    • 2: Days are counted from Monday. The value of Monday is 1, and the value of Sunday is 7.


  • If today is Sunday, January 1, 2012 the following function returns 1:
  • If December 31, 2013 is a Tuesday, The following function returns 3:
  • The following function returns 2:
    weekday(date(2013,12,31), 2)
  • If c:"specialDay" is a formula column that specifies Thursday, October 1, 2015, the following function returns 5:
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