Description

Determines the ordinal (day number, in the year) of the first day of the month in which a given date falls.

Returns

A number that corresponds to a day-number in a year.

Category

Date and time functions

Function syntax

FirstDayOfMonth(date)

See also

Day, DayOfWeek, DayOfWeekAsString, DayOfYear, DaysInMonth, DaysInYear

Parameters

Usage

When passing a date/time value as a string, you must enclose it in quotation marks. Otherwise, it is interpreted as a number representation of a date/time object.

Example

<h3>FirstDayOfMonth Example</h3>

<cfoutput>
The first day of #MonthAsString(Month(Now()))#, #Year(Now())# was 
day #FirstDayOfMonth(Now())# of the year.
</cfoutput>