[154446] in North American Network Operators' Group
Re: F-ckin Leap Seconds, how do they work?
daemon@ATHENA.MIT.EDU (Paul Graydon)
Wed Jul 4 00:29:42 2012
Date: Tue, 03 Jul 2012 18:29:01 -1000
From: Paul Graydon <paul@paulgraydon.co.uk>
To: nanog@nanog.org
In-Reply-To: <952F93D4-E6B1-49C5-9694-E9292E3A4E36@delong.com>
X-SA-Exim-Mail-From: paul@paulgraydon.co.uk
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 7/3/2012 1:53 PM, Owen DeLong wrote:
>
> UTC (and the system clock) should not move backwards, but, rather they repeat
> second 59. UTC goes 58->59->00 most of the time, but during a leap second, it
> should go 58->59->59->00). It's not so much going backwards as dropping a chime.
>
If they do that, they're "doing it wrong", UTC and the system clock
should go 58->59->60->00. From the IERS bulletin announcing the leap
second just past:
http://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat
"A positive leap second will be introduced at the end of June 2012.
The sequence of dates of the UTC second markers will be:
2012 June 30, 23h 59m 59s
2012 June 30, 23h 59m 60s
2012 July 1, 0h 0m 0s"
