Excel WEEKDAY Function
Introduction
The Excel WEEKDAY function takes a date and returns a number
between 1-7 representing the day of week. By default WEEKDAY returns 1 for
Sunday and 7 for Saturday. You can use the WEEKDAY function inside other
formulas to check the day of week and react as needed.
Purpose
Get the day of the week as a number
Return value
A number between 0 and 7
Syntax
=WEEKDAY (serial_number, [return_type])
Arguments
· serial_number - The date for which you want to
get the day of week.
· return_type - [optional] A number representing
day of week mapping scheme. Default is 1.
Usage notes
WEEKDAY accepts a date and returns a number between 1-7
representing the day of week for that date. By default WEEKDAY returns 1 for
Sunday and 7 for Saturday as shown in the table below:
Result |
Meaning |
1 |
Sunday |
2 |
Monday |
3 |
Tuesday |
4 |
Wednesday |
5 |
Thursday |
6 |
Friday |
7 |
Saturday |
WEEKDAY supports several numbering schemes. The return type
argument determines which scheme used to map each day of week to a number. The
return type is optional and defaults to 1. The table below shows the result and
mapping associated with each return type:
Return type |
Numeric result |
Day mapping |
none |
1-7 |
Sunday-Saturday |
1 |
1-7 |
Sunday-Saturday |
2 |
1-7 |
Monday-Sunday |
3 |
0-6 |
Monday-Sunday |
11 |
1-7 |
Monday-Sunday |
12 |
1-7 |
Tuesday-Monday |
13 |
1-7 |
Wednesday-Tuesday |
14 |
1-7 |
Thursday-Wednesday |
15 |
1-7 |
Friday-Thursday |
16 |
1-7 |
Saturday-Friday |
17 |
1-7 |
Sunday-Saturday |
The WEEKDAY function will return a value even when the date
is empty. Take care to trap this result if blank dates are possible.
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