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Week functions

Include: Use System\DateTime.pkg

Week functions calculate weekday, week number, and ISO week-year values from a DateTime.

Functions

Function Signature Description
DateGetDayofWeek_WDS Function DateGetDayofWeek_WDS Global DateTime dtValue Integer iWeekDayStart Returns Integer Returns weekday using the supplied week start; 1 is Sunday, 2 is Monday.
DateGetWeekOfYear_WDS Function DateGetWeekOfYear_WDS Global DateTime dtValue Integer iWeekDayStart Returns Integer Returns week of year using the supplied week start; week 1 contains January 1.
DateGetWeekOfYear Function DateGetWeekOfYear Global DateTime dtValue Returns Integer Returns the standard week of year.
DateGetDayofWeekISO Function DateGetDayofWeekISO Global DateTime dtValue Returns Integer Returns ISO weekday.
DateGetYearOfWeekISO Function DateGetYearOfWeekISO Global DateTime dtValue Returns Integer Returns ISO week-year.
DateGetWeekOfYearISO Function DateGetWeekOfYearISO Global DateTime dtValue Returns Integer Returns ISO week number; weeks start Monday and week 1 contains Thursday.

Syntax

Function DateGetDayofWeek_WDS Global DateTime dtValue Integer iWeekDayStart Returns Integer

Function DateGetWeekOfYear_WDS Global DateTime dtValue Integer iWeekDayStart Returns Integer

Function DateGetWeekOfYear Global DateTime dtValue Returns Integer

Function DateGetDayofWeekISO Global DateTime dtValue Returns Integer

Function DateGetYearOfWeekISO Global DateTime dtValue Returns Integer

Function DateGetWeekOfYearISO Global DateTime dtValue Returns Integer

Example

DateTime dtValue
Integer iWeek
Get DateSet 2026 1 5 to dtValue
Get DateGetWeekOfYearISO dtValue to iWeek

See also