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    Re: Keep checking your GPS
    From: Bill B
    Date: 2015 Feb 09, 13:14 -0500

    On 2/8/2015 9:26 PM, John D. Howard wrote:
    > There wa a time when the day started at Noon, not Midnight.  Each town
    > had its own time.  Then came the railroads.
    
    Encyclopedia Britannica (online)
    
    "Greenwich Mean Time was used for clearly designating epoch by avoiding
    confusing references to local time systems (zones). In accord with
    astronomical tradition, astronomers had always used Greenwich Mean
    Astronomical Time (GMAT)—the same as GMT but with the day beginning at
    noon. In 1925 GMT was adopted by astronomers so that the astronomical
    day began at midnight, the same time as the civil day. Some confusion in
    terminology resulted, though, and in 1928 the International Astronomical
    Union changed the designation of the standard time of the Greenwich
    meridian to Universal Time, which remains in general use in a modified
    form as Coordinated Universal Time (UTC). The term GMT is still used for
    some purposes—e.g., navigation in English-speaking countries."
    --Jonathan D. Betts
    
    
    

       
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