Name

Weekday Function — Microsoft.VisualBasic.DateAndTime

Synopsis

Weekday(datevalue, [dayofweek])
date required; Date or valid date expression

Any valid date expression

dayofweek optional; Constant of FirstDayOfWeek enumeration

A constant indicating the first day of the week

Return Value

Integer

Description

Determines the day of the week of a given date. The default for dayofweek is FirstDayOfWeek.Sunday.

To determine the day of the week, think of the day specified by dayofweek as day 1, and the value returned by the function as indicating the day relative to day 1. Then, for example, if the return value of WeekDay is 2, this specifies the day following dayofweek. A return value of 1 specifies dayofweek. A return value of 7 specifies the day before dayofweek.

The members of the FirstDayOfWeek enumeration are:

Constant

Value

Description

Sunday

1

Sunday

Monday

2

Monday

Tuesday

3

Tuesday

Wednesday

3

Wednesday

Thursday

4

Thursday

Friday

5

Friday

Saturday

6

Saturday

Sunday

7

Sunday

Passing a value of 0 as the dayofweek argument uses the system’s locale settings to determine the first day of the week.

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