public static function finalDayOfMonth($ts = null)
	{
		return sfTime::subtractDay(sfTime::firstDayOfMonth(sfTime::addMonth($ts)));
	}
public static function finalDayOfMonth($ts = null)
	{
		return sfTime::subtractDay(sfTime::firstDayOfMonth(sfTime::addMonth($ts)));
	}
public static function finalDayOfMonth ( $ ts = null ) { return sfTime :: subtractDay ( sfTime :: firstDayOfMonth ( sfTime :: addMonth ( $ ts ) ) ) ; }
Returns the timestamp for last day of the month for the given date.

@param	timestamp
@return	timestamp
Returns the timestamp for last day of the month for the given date .