[LEAPSECS] LEAPSECS Digest, Vol 45, Issue 1

Rob Seaman seaman at noao.edu
Fri Sep 3 17:14:18 EDT 2010

Greenwich Mean Time is the Mean Solar Time in Greenwich. Is this its "historical astronomical meaning"? Or is this its "definition"?
On Sep 3, 2010, at 10:49 AM, Tony Finch wrote:

> On Fri, 3 Sep 2010, Rob Seaman wrote:

>> On Sep 3, 2010, at 2:18 AM, Tony Finch wrote:


>>> If you are syncing to what is now called "GMT" you are syncing to UTC

>>> because they are now in practice exact synonyms.


>> And this is precisely what the ITU is planning to break.


> I'm not sure that's true. The only de jure definition of GMT is "civil

> time in the UK in winter". The British government and its agencies

> currently implement GMT as equivalent to UTC. If the ITU change the

> definition of GMT, and if the British government continues to follow ITU

> recommendations and to disregard the historical astronomical meaning of

> GMT, then the equivalence will continue.


> Tony.

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