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DifferentDay(date1, date2)

Last updated March 21, 2002

author

Matthew Walker

Version: 1 | Requires: CF5 | Library: DateLib

Description:
Check if two dates refer to the same day. This is different from using the built-in function DateDiff("d") as it will only count whole days difference, whereas a difference of just a second could be the difference between one day and another.

Return Values:
Returns a boolean.

Example:

<cfoutput>
DifferentDay test: 
#DifferentDay("{ts '2003-01-01 23:59:59'}","{ts '2003-01-02 00:00:00'}")#<br>
Compare to DateDiff: 
#DateDiff("d","{ts '2003-01-01 23:59:59'}","{ts '2003-01-02 00:00:00'}")#
</cfoutput>

Parameters:

Name Description Required
date1 First date to check. Yes
date2 Second date to check. Yes

Full UDF Source:

/**
 * Check if two dates refer to the same day.
 * 
 * @param date1 	 First date to check. 
 * @param date2 	 Second date to check. 
 * @return Returns a boolean. 
 * @author Matthew Walker (matthew@cabbagetree.co.nz) 
 * @version 1, March 21, 2002 
 */
function DifferentDay(date1, date2) {
	return ( ( DayOfYear(date1) NEQ DayOfYear(date2) ) OR ( Year(date1) NEQ Year(date2) ) );
}
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