daysInMonth

Determines the number of days in a month.

daysInMonth(date) → returns numeric

Member Function Syntax

date.daysInMonth()

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  2. Functions
  3. Date and Time Functions
  4. daysInMonth
  5. CF
  6. Lucee
  7. BL 1.0.0+
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See Also:   day   dayOfWeek   dayOfWeekAsString   dayOfYear   daysInYear   firstDayOfMonth

Argument Reference

date date
Required

Date or datetime object (100AD-9999AD).
When passing a datetime object as a string, enclose it in quotation marks, otherwise, it is interpreted as a numeric representation of a datetime object.

Compatibility

ColdFusion:

Member function is available in CF11+.

Lucee:

Lucee allows an optional timezone parameter. Member function is available in Lucee4.5+.

Examples
Sample code invoking the daysInMonth function

Uses the daysInMonth function to determine the number of days in a month

<cfset Date = CreateDate(2012, 12, 30)>
<cfset result = daysInMonth(Date)>
<cfoutput>#result#</cfoutput>

Expected Result: 31

To determine the number of days in a month

<cfset Date = CreateDate(2012, 02, 03)>
<cfset result = daysInMonth(Date)>
<cfoutput>#result#</cfoutput>

Expected Result: 29

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