public static long timeToMs(int day, int hour, int min, int sec) {
		return ((long) CONSTANT_1000) * (((day * CONSTANT_24 + hour) * CONSTANT_60 + min) * CONSTANT_60 + sec);
	}
Convert time to millisecond.

@param day	day
@param hour	hour
@param min	min
@param sec	sec
@return converted millisecond
ngrinder-core/src/main/java/org/ngrinder/common/util/DateUtils.java