On 2011-01-07, at 01:42, Keith Winstein wrote:
Yes, it's similar to Tom Van Baak's proposal for a Leap Second Every
Month (positive or negative) that he sent out in November and
generated some discussion
Ouch! Yes, I now remember seeing that.
N
On 7 Jan 2011, at 00:28, Poul-Henning Kamp wrote:
In message 47d3bba6-a381-4dad-ad56-08e2b40fd...@pipe.nl, Nero
Imhard writes:
Each year should have at least two [...]
Have you considered that in asia one of them is likely to happen
during
the business day ?
Summer Time shifts
On Jan 7, 2011, at 6:08 AM, Zefram wrote:
Currently, a June leap second can occur while far-east markets are open.
There is nothing magic about the end of the month scheduling. It has some
advantages, that's all.
DST adjustments on the other hand are (usually? always? some places?
In message 06bd6317-458b-4c30-a773-c23108ddc...@noao.edu, Rob Seaman writes:
As usual you try to fudge the fundamental facts to your point of view:
1. UTC is supposed to be universal, so that UTC=X is the same instant
everywhere, within our measuring ability.
2. There is no requirement that
On Jan 7, 2011, at 7:37 AM, Poul-Henning Kamp wrote:
As usual you try to fudge the fundamental facts to your point of view:
Get a good introductory astronomy text and a transparent celestial globe.
Spend some time understanding the differing natures of apparent solar time
and mean solar
In message 0a3268a1-4bbd-4b45-abca-04b9e1821...@noao.edu, Rob Seaman writes:
On Jan 7, 2011, at 7:37 AM, Poul-Henning Kamp wrote:
Put it this way. Diurnal periods are ubiquitous in our cultural
norms and the technical systems underlying them.
That is a value judgment which should be left to
On 01/07/2011 01:54 PM, Ian Batten wrote:
On 7 Jan 2011, at 00:28, Poul-Henning Kamp wrote:
In message 47d3bba6-a381-4dad-ad56-08e2b40fd...@pipe.nl, Nero Imhard
writes:
Each year should have at least two [...]
Have you considered that in asia one of them is likely to happen during
the
Rob Seaman said:
As discussed, we can't apply leap seconds using local scheduling - BUT
nothing stops us from requiring that they be applied only on Sundays. I
haven't had my coffee yet, but I believe this would result in their happening
at midday in Greenwich - but it would be midday on a
Either someone out there is reading leapsecs - or somebody else is paying
attention. Either way it is a good thing :-)
--
Begin forwarded message:
From: central_bur...@iers.org
Date: January 7, 2011 8:40:47 AM MST
To: messa...@iers.org
Subject: IERS Message No. 180 - revised version
On Fri, 2011-01-07 at 13:08 +, Zefram wrote:
being a second out of synch would cause reconciliation problems.
can you explain this closer to the tech please?
i know i got the same explanation from one of our support
people until I challenged him...
we then went into the code and analysed
Currently local time zones range from Christmas Island, on Z+14:00, to Midway
Island, on Z-11:00 (I use Z to avoid the UTC/UT/GMT argument). So there's
always somewhere where it's not Sunday.
That should make Doctor Who aficionados happy. He never lands on Sunday.
(Perhaps he's trying to
On 01/07/2011 03:37 PM, Rob Seaman wrote:
On Jan 7, 2011, at 6:08 AM, Zefram wrote:
Currently, a June leap second can occur while far-east markets are open.
There is nothing magic about the end of the month scheduling. It has some
advantages, that's all.
DST adjustments on the other hand
On 01/07/2011 09:16, Paul Sheer wrote:
On Fri, 2011-01-07 at 13:08 +, Zefram wrote:
being a second out of synch would cause reconciliation problems.
can you explain this closer to the tech please?
i know i got the same explanation from one of our support
people until I challenged him...
- Forwarded message from central_bur...@iers.org -
Date: Fri, 7 Jan 2011 16:40:53 +0100
From: central_bur...@iers.org
Subject: IERS Message No. 180 - revised version
To: messa...@iers.org
Please note: This is a corrected version of IERS Message No. 180
distributed on
On 01/07/2011 03:37 PM, Rob Seaman wrote:
DST adjustments on the other hand are (usually? always? some places?
everywhere?) scheduled for Sundays at local 2am.
That's a US-centric view.
In the EU, they happen at 01:00 UT/UTC/GMT (depending on which language you
use) in both directions. In
On Jan 7, 2011, at 9:32 AM, Poul-Henning Kamp wrote:
You don't get to decide if it is a fact, of if it is, if it is an
unchangeable one:
Indeed I don't! It is fact - or not - whether I (or you) believe or not.
That is an issue for each nation and their government.
Given modern politics it
On Jan 7, 2011, at 9:36 AM, Warner Losh wrote:
On 01/07/2011 07:55, Rob Seaman wrote:
Eliminating leap seconds is an attempt to change the period of the day. But
the Sun says otherwise.
No. Eliminating leap seconds keeps the period of the day constant.
I didn't say the period of the day
On Fri, 7 Jan 2011, Rob Seaman wrote:
It is a requirement - a description of the problem space - that manifold
human activities are loosely or tightly coupled to the synodic day.
Which? UTC with leap seconds is tightly coupled to the day. Atomic time
adjusted with a locally-determined timezone
On Fri, 7 Jan 2011, Warner Losh wrote:
Eliminating leap seconds keeps the period of the day constant.
Not really, because there is no single period of the day :-) There are
days according to UT1, UTC, local time, etc. and these lengths all differ
and none of them is (currently) constant. Fixing
Anyone else get a Doctor Who disappearing TARDIS mug for Christmas? ;-)
-- Richard
P.S. I also got a sundial (just in case the ITU decision goes the wrong way).
Quoting Rob Seaman sea...@noao.edu:
Currently local time zones range from Christmas Island, on Z+14:00,
to Midway Island, on Z-11:00
On Jan 7, 2011, at 11:00 AM, Tony Finch wrote:
On Fri, 7 Jan 2011, Rob Seaman wrote:
It is a requirement - a description of the problem space - that manifold
human activities are loosely or tightly coupled to the synodic day.
Which? UTC with leap seconds is tightly coupled to the day.
There is no IAU support for the proposal to eliminate the leap second.
On the other hand, there is just not consensus one way or the other.
However, perceived IAU support was cited at the SG7 meeting in Geneva.
That misconception has been corrected, as reported from credible and
trustworthy
On 01/07/2011 15:34, Finkleman, Dave wrote:
There is no IAU support for the proposal to eliminate the leap second.
On the other hand, there is just not consensus one way or the other.
However, perceived IAU support was cited at the SG7 meeting in Geneva.
That misconception has been corrected, as
On 01/07/2011 15:55, Paul Sheer wrote:
Both sides of the transaction stamp the transaction with
timestamps with microsecond resolution.
Is this a fact?
When the trades are reconciled at the end of
the day, these timestamps need to match with a fuzz factor
that's in the sub-millisecond range
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