jodd-core/src/main/java/jodd/time/JulianDate.java
public long toMilliseconds() {
		double then = (fraction - JD_1970.fraction) * MILLIS_IN_DAY;
		then += (integer - JD_1970.integer) * MILLIS_IN_DAY;
		then += then > 0 ? 1.0e-6 : -1.0e-6;
		return (long) then;
	}
public long toMilliseconds() {
		double then = (fraction - JD_1970.fraction) * MILLIS_IN_DAY;
		then += (integer - JD_1970.integer) * MILLIS_IN_DAY;
		then += then > 0 ? 1.0e-6 : -1.0e-6;
		return (long) then;
	}
Converts to milliseconds.