jodd-core/src/main/java/jodd/time/TimeUtil.java
public static String formatHttpDate(final long millis) {
		final Date date = new Date(millis);
		return HTTP_DATE_FORMAT.format(date);
	}
public static String formatHttpDate(final long millis) {
		final Date date = new Date(millis);
		return HTTP_DATE_FORMAT.format(date);
	}
Formats time to HTTP date/time format. Note that number of milliseconds
is lost.