>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?
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>Albert

Er, "00:00" is not military time but 24-hr time. The military uses no colon, (e.g. 1200, 1324, as opposed to 12:00 and 13:24). 24hr time is used in many countries (probably most countries around the world). And as said in this thread, it's 00:00, not 24:00 (goes from 00:00 to 23:59).