FlexOOP

/**
 * Gets the Xth day of the month.
 * e.g. get the 3rd Wednesday of the month
 * 
 * @param iteration		The iteration of the month to get e.g. 4th or Last
 * @param strDayOfWeek	The day of the week as a string
 * @param date			The date containing the month and year
 * 
 * @return				The date of the xth dayOfWeek of the month 
 */
public static function dayOfWeekIterationOfMonth( iteration:Number, strDayOfWeek:String, date:Date ):Date {
	// get the numeric day of the week for the requested day
	var _dayOfWeek:Number = dayOfWeekAsNumber( strDayOfWeek );
	// get the date for the first of the month
	var _firstOfMonth:Date = new Date( date.fullYear, date.month, 1 );
	// calculate how many days to add to get to the requested day from the first of the month
	var _daysToAdd:Number = _dayOfWeek - DateUtils.dayOfWeek( _firstOfMonth );
	// if dayOfWeek is before the first of the month, get the dayOfWeek for the following week
	if ( _daysToAdd < 0 ) {
		_daysToAdd += 7;
	}
	// set the date to the first day of the week for the requested date
	var _firstDayOfWeekOfMonth:Date = DateUtils.dateAdd( DateUtils.DAY_OF_MONTH, _daysToAdd, _firstOfMonth );
	// return the date if iteration is 1
	if ( iteration == 1 ) {
		return _firstDayOfWeekOfMonth;
	} else {
		// if requesting an iteration that is more than is in that month or requesting the last day of week of month
		// return last date for that day of week of month
		if ( ( DateUtils.totalDayOfWeekInMonth( strDayOfWeek, date ) < iteration ) || ( iteration == DateUtils.LAST ) ) {
			iteration = DateUtils.totalDayOfWeekInMonth( strDayOfWeek, date );
		}
		// subtract 1 as it starts from the first dayOfWeek of month
		return DateUtils.dateAdd( DateUtils.WEEK, iteration - 1, _firstDayOfWeekOfMonth );
	}
}

import com.flexoop.utilities.dateutils.DateUtils;

private var _dateOfIteration:Date = DateUtils.dayOfWeekIterationOfMonth( 3, DateUtils.TUESDAY, new Date( 2008, DateUtils.monthAsNumber( DateUtils.MAY ) ) );