Okay, a quick one - is 12:00 midnight "00:00" in military time or is it "24:00" (you can tell I have never been in the military)? Likewise, is the range of acceptable values "00:01" to "24:00" or "00:00" to "23:59"? And finally, is it possible that both 00:00 and 24:00 are acceptable values?

Albert