WeekDay Function

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# WeekDay Function (BASIC)

Returns the number corresponding to the weekday represented by a serial date number that is generated by the DateSerial or the DateValue function.

### Syntax:

    WeekDay (Number)

### Return value:

Integer

### Parameters:

Number: Integer expression that contains the serial date number that is used to calculate the day of the week (1-7).

The following example determines the day of the week using the WeekDay function when you enter a date.

### Error codes:

5 Invalid procedure call

### Example:

    Sub ExampleWeekDay
    Dim sDay As String
    ' Return And display the day of the week
        Select Case WeekDay( Now )
            Case 1
                sDay="Sunday"
            Case 2
                sDay="Monday"
            Case 3
                sDay="Tuesday"
            Case 4
                sDay="Wednesday"
            Case 5
                sDay="Thursday"
            Case 6
                sDay="Friday"
            Case 7
                sDay="Saturday"
        End Select
        MsgBox "" + sDay,64,"Today Is"
    End Sub