Re: os.time epoch on Windows
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- Subject: Re: os.time epoch on Windows
- From: Louis Mamakos <louie@...>
- Date: Mon, 4 May 2009 12:58:44 -0400
If you want to be pedantic, UTC and GMT are not identical, nor is UTC
derived from GMT. UTC is an internationally-based time scale, based
on contributions by multiple national time/frequency standards that
are based on, e.g., cesium clocks and other intrinsic standards,
whilst GMT is based on solar time. When these get out of whack, leap
seconds are required to keep the time scales roughly aligned.
http://www.apparent-wind.com/gmt-explained.html
If you keep time by looking at your wristwatch, you can probably just
ignore the difference and dismiss me as a crazy person. If you notion
of timekeeping routinely extends into the sub-millisecond regime and
beyond, well, you worry about this stuff. I spent a lot of time
working on an early NTP implementation, and keeping an accurate clock
is harder than you think. But that's usually the case with most
things..
louie
On May 4, 2009, at 12:35 PM, John Hind wrote:
And -5 hours from Greenwich, UK the true centre (rather than
center!) of the
universe and the datum for UTC. So maybe Windows DOES know about UTC?
-----Original Message-----
From: lua-bounces@bazar2.conectiva.com.br
[mailto:lua-bounces@bazar2.conectiva.com.br] On Behalf Of Paul Hudson
Sent: 04 May 2009 17:17
To: 'Lua list'
Subject: RE: os.time epoch on Windows
there's no concept of UTC in windows, so france is -5 hours from
'the
center of the world' AKA Redmond, WA.
Redmond and France are 9 hours different, not 5?
I live in: Québec, Quebec, Canada
Which is 3 hours different from Redmond.