Re: Date and time on Cindu: yearly update

Yes, and astronomers still use that time, called strictly GMAT (G.M.
Astronomical Time), especially in conjunction with the JD (Julian Date)
which numbers days sequentially from a zero point in about 4700 BC. It's
used to calculate differences in days independent of months or years.
Mike
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> Originally, GMT was defined such that zero hours (0:00 GMT) was NOON.
> It was defined by astronomers, see, and it's more convenient for
> astronomers if the date doesn't change during the night. Starting in
> the 1920's it was changed such that zero hours is midnight, and that
> source of potential 12-hour confusion was really the only reason the
> term was officially deprecated as part of the switch to a civil time
> standard based on atomic time.
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> --
> Mark J. Reed <markjreed@...>
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