Function to Check Whether Date is a Business Day or Not (ex: Weekend or Holiday)

isBusinessDay.java

/**
 * Is Date A Business Day?
 * @param cal 
 * @return boolean
 */
public boolean isBusinessDay(Calendar cal){
	// check if weekend
	if(cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY || cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY){
		return false;
	}
	
	// check if New Year's Day
	if (cal.get(Calendar.MONTH) == Calendar.JANUARY
		&& cal.get(Calendar.DAY_OF_MONTH) == 1) {
		return false;
	}
	
	// check if Christmas
	if (cal.get(Calendar.MONTH) == Calendar.DECEMBER
		&& cal.get(Calendar.DAY_OF_MONTH) == 25) {
		return false;
	}
	
	// check if 4th of July
	if (cal.get(Calendar.MONTH) == Calendar.JULY
		&& cal.get(Calendar.DAY_OF_MONTH) == 4) {
		return false;
	}
	
	// check Thanksgiving (4th Thursday of November)
	if (cal.get(Calendar.MONTH) == Calendar.NOVEMBER
		&& cal.get(Calendar.DAY_OF_WEEK_IN_MONTH) == 4
		&& cal.get(Calendar.DAY_OF_WEEK) == Calendar.THURSDAY) {
		return false;
	}
	
	// check Memorial Day (last Monday of May)
	if (cal.get(Calendar.MONTH) == Calendar.MAY
		&& cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY
		&& cal.get(Calendar.DAY_OF_MONTH) > (31 - 7) ) {
		return false;
	}
	
	// check Labor Day (1st Monday of September)
	if (cal.get(Calendar.MONTH) == Calendar.SEPTEMBER
		&& cal.get(Calendar.DAY_OF_WEEK_IN_MONTH) == 1
		&& cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
		return false;
	}
	
	// check President's Day (3rd Monday of February)
	if (cal.get(Calendar.MONTH) == Calendar.FEBRUARY
	&& cal.get(Calendar.DAY_OF_WEEK_IN_MONTH) == 3
	&& cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
	return true;
	}
	
	// check Veterans Day (November 11)
	if (cal.get(Calendar.MONTH) == Calendar.NOVEMBER
	&& cal.get(Calendar.DAY_OF_MONTH) == 11) {
	return true;
	}
	
	// check MLK Day (3rd Monday of January)
	if (cal.get(Calendar.MONTH) == Calendar.JANUARY
	&& cal.get(Calendar.DAY_OF_WEEK_IN_MONTH) == 3
	&& cal.get(Calendar.DAY_OF_WEEK) == Calendar.MONDAY) {
	return true;
	}
	
	// IF NOTHING ELSE, IT'S A BUSINESS DAY
	return true;
}