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DayOfWeek
Last update:
May 18, 2026
Description
Determines the day of the week, in a date.
Returns
The ordinal for the day of the week, as an integer in the range 1 (Sunday) to 7 (Saturday).
Category
History
ColdFusion (2018 release) Update 2: Added the parameter calendar.
ColdFusion (2016 release) Update 8: Added the parameter calendar.
Function syntax
DayOfWeek(date)Parameters
Parameter | Required/Optional | Description |
date | Required | Date/time object, in the range 100 AD-9999 AD. |
calendar | Optional | Values are either "iso" or "gregorian". |
See also
Usage
When passing a date/time object as a string, enclose it in quotation marks. Otherwise, it is interpreted as a numeric representation of a date/time object.
You can pass the CreateDate function or Now function as the date parameter of this function; for example, #DayOfWeek(CreateDate(2001, 3, 3))# |
Example 1
<cfscript>
Date1 = "{ts '2018-11-06 12:13:50'}";
Dayofweek= DayOfWeek(Date1)
// writeOutput(Date1 & "<br/>")
writeOutput("Day of week: " & DayofWeek & "")
</cfscript>Output
Day of week: 3
Example 2
<cfscript>
dateTime = createDate(2016,1,3); //Sunday, January 3, 2016
writeOutput(dayOfWeek(dateTime, "iso"));
</cfscript>Output
7
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