Xref: utzoo comp.misc:2053 rec.aviation:5911
Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!mailrus!tut.cis.ohio-state.edu!bloom-beacon!gatech!uflorida!codas!usfvax2!jc3b21!jra
From: jra@jc3b21.UUCP (Jay R. Ashworth)
Newsgroups: comp.misc,rec.aviation
Subject: Re: Timezones
Message-ID: <325@jc3b21.UUCP>
Date: 5 Mar 88 21:43:21 GMT
References: <1083@ektools.UUCP>
Organization: A&P Productions
Lines: 41

From article <1083@ektools.UUCP>, by john@ektools.UUCP (John H. Hall):
> Ok, so GMT is now called UTC or "Universal Coordinated Time".  As a
> pilot, I know that aviation weather reports, flight plans, and a whole
> bunch of other such things are reported in "Zulu time", where "Zulu"
> is the ICAO phonetic alphabet's letter "Z".  Times are written with a
> "Z" suffix, as in "0830Z".  Zulu time is EST+5 and EDT+4 (Your
> timezones may vary.  Half an hour earlier in Newfoundland).  Is Zulu
> time just another expression of UTC?

Yes.

> Another question about UTC.  Does it run from 0000 to 2359, or from
> 0001 to 2400?  What is the UTC at midnight (in Greenwich)?

Both.  0000=2400, but 0000 is associated with today's UTC date, while
2400 is assoicated with yesterday's.

Generally, "Zulu" is a phonetic expression of "Z", the code for this
time zone.  All the time zones in the world have a one-letter
identifier.  The one for Grenwich happens to be "Z".  Anyone
interested in time might want to write to the NBS, Radio Station WWV,
as they have several standard publications about the subject.
Unfortunately, I don't have Pub. #'s for this stuff, but they might
send you a list...

	National Bureau of Standards
	radio Station WWV
	200 E. County Rd. 58
	Ft Collins  CO  80302

-- jra, KA1FJX
> 
> -- 
> John Hall, Supervisor: Software Tools Group, Product Software Engineering
> EASTMAN KODAK COMPANY, 901 Elmgrove Rd., Rochester, NY 14650,  716 726-9345
> UUCP:   {allegra, rutgers}!rochester!kodak!ektools!john
> ARPA:   kodak!ektools!john@rochester.ARPA
-- 
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