WEEKDAY function

Returns the day of the week corresponding to a date. The day is given as an integer, ranging from 1 (Sunday) to 7 (Saturday), by default.

Syntax

WEEKDAY(serial_number,return_type)

Important

Dates should be entered by using the DATE function, or as results of other formulas or functions. For example, use =DATE(2008,5,23) for the 23rd day of May, 2008. Problems might occur if dates are entered as text.

Argument

Description

Remarks

serial_number

The date that falls within the year you want to find.

• None.

return_type

A number that determines on which day the week begins. The default is 1.

• 1 or omitted returns numbers 1 (Sunday) through 7 (Saturday). Behaves like earlier versions of Excel.

2 returns numbers 1 (Monday) through 7 (Sunday).

3 returns numbers 0 (Monday) through 6 (Sunday).

General remarks

Excel stores dates as sequential serial numbers so they can be used in calculations. By default, January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900.

Example

To make the following example easier to understand, you can copy the data to a blank sheet and then enter the function underneath the data. Do not select the row or column headings (1, 2, 3... A, B, C...) when you copy the sample data to a blank sheet.

 Note  2/14/2008 is a Thursday.
 1 2
 A B Data 2/14/2008 Formula Description (Result) =WEEKDAY(A2) Day of the week, with numbers 1 (Sunday) through 7 (Saturday) (5) =WEEKDAY(A2,2) Day of the week, with numbers 1 (Monday) through 7 (Sunday) (4) =WEEKDAY(A2,3) Day of the week, with numbers 0 (Monday) through 6 (Sunday) (3)
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