Weekday Method

DateAndTime.Weekday Method (DateTime, FirstDayOfWeek)

 

Returns an Integer value containing a number representing the day of the week.

Namespace:   Microsoft.VisualBasic
Assembly:  Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)

public static int Weekday(
	DateTime DateValue,
	FirstDayOfWeek DayOfWeek = FirstDayOfWeek.Sunday
)

Parameters

DateValue
Type: System.DateTime

Required. Date value for which you want to determine the day of the week.

DayOfWeek
Type: Microsoft.VisualBasic.FirstDayOfWeek

Optional. A value chosen from the FirstDayOfWeek enumeration that specifies the first day of the week. If not specified, FirstDayOfWeek.Sunday is used.

Return Value

Type: System.Int32

Returns an Integer value containing a number representing the day of the week.

Exception Condition
ArgumentException

DayOfWeek is less than 0 or more than 7.

The value returned by the Weekday function corresponds to the values of the FirstDayOfWeek enumeration; that is, 1 indicates Sunday and 7 indicates Saturday.

System_CAPS_noteNote

Weekday uses the current calendar setting from the CurrentCulture property of the CultureInfo class in the System.Globalization namespace. The default CurrentCulture values are determined by Control Panel settings.

The DayOfWeek argument can have one of the following settings.

Enumeration value

Value

Description

FirstDayOfWeek.System

0

First day of week specified in system settings

FirstDayOfWeek.Sunday

1

Sunday (default)

FirstDayOfWeek.Monday

2

Monday (complies with ISO standard 8601, section 3.17)

FirstDayOfWeek.Tuesday

3

Tuesday

FirstDayOfWeek.Wednesday

4

Wednesday

FirstDayOfWeek.Thursday

5

Thursday

FirstDayOfWeek.Friday

6

Friday

FirstDayOfWeek.Saturday

7

Saturday

The following example uses the Weekday function to obtain the day of the week from a specified date.

Dim oldDate As Date
Dim oldWeekDay As Integer
oldDate = #2/12/1969#
oldWeekDay = Weekday(oldDate)
' oldWeekDay now contains 4 because thisDate represents a Wednesday.

.NET Framework
Available since 1.1
Silverlight
Available since 2.0
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