Re: Time zones are driving me CRAZY [partially SOLVED]
Re: Time zones are driving me CRAZY [partially SOLVED]
- Subject: Re: Time zones are driving me CRAZY [partially SOLVED]
- From: Thomas Ganter <email@hidden>
- Date: Fri, 14 Nov 2003 22:45:52 +0100
GMT and UTC may differ by up to 1 second:
From http://sts.sunyit.edu/timetech/gmt-utc.html:
The development of highly accurate cesium-beam atomic clocks led to the
redefinition of the second in 1967. This led to the recognition by
scientists and technologists of the inadequacy of measuring time based
on the erratic motion of the earth whose rate fluctuates by a few
thousandths of a second a day. Attempts to couple GMT, based on the
earth's motion, and the new definition of the second was highly
unsatisfactory. A compromise time scale, Coordinated Universal Time
(UTC), was devised and became effective on January 1, 1972.
UTC normally runs at the rate of cesium-beam atomic clocks. When the
difference between this atomic time and one based on the Earths
rotation approaches one second, a one-second adjustment (a "leap
second") is made in UTC, thereby maintaining synchronization between
arbitrary date-time and the Earths journey about its axis and the sun.
Hence, the behavior of the Earth retains primacy for date-time, while
actual elasped-time (laboratory time) is demarcated by the hyperfine
atomic clock.
Am 14.11.2003 um 21:19 schrieb Denis Stanton:
> On Saturday, November 15, 2003, at 03:14 AM, Pierre Bernard wrote:
>
>> - due to the fact that UTC and GMT are not equal, yet where Apple
>> expects to get UTC, Sun merrily hands over GMT.
>
> For the sake of my education can you tell me the difference between
> UTC and GMT? i thought it was like the difference between Centigrade
> and Celsius - i.e, just a clarification of name for the same thing
>
> Hope you get your medal
>
> Denis Stanton
> email@hidden
> Home: (09) 533 0391
> mobile: 021 1433622
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