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FirstWeekOfYear Enumeration

When you call date-related functions, you can use the following enumeration members in your code in place of the actual values.

Some date-related functions take a DayOfWeek argument, a WeekOfYear argument, or both. The FirstWeekOfYear enumeration specifies the valid values for the WeekOfYear arguments, as well as the possible return values from the functions.

FirstWeekOfYear Enumeration Members

The WeekOfYear argument takes the following FirstWeekOfYear enumeration members:

Member Constant Description
System vbUseSystem The day of the week specified in your system settings as the first day of the week
Jan1 vbFirstJan1 The week in which January 1 occurs (default)
FirstFourDays vbFirstFourDays The first week that has at least four days in the new year
FirstFullWeek vbFirstFullWeek The first full week of the year


Namespace: Microsoft.VisualBasic

Assembly: Microsoft Visual Basic .NET Runtime (in Microsoft.VisualBasic.dll)

See Also

Intrinsic Constants and Enumerations | FirstDayOfWeek Enumeration | DateFormat Enumeration | DateDiff Function | DatePart Function | Format Function