linux-kernel - Re: Bug: Status/Summary of slashdot leap-second crash on new years 2008-2009

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Message-ID: <20090105004405.2607b506@lxorguk.ukuu.org.uk>
Date:	Mon, 5 Jan 2009 00:44:05 +0000
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	david@...g.hm
Cc:	David Newall <davidn@...idnewall.com>,
	Kyle Moffett <kyle@...fetthome.net>,
	Ben Goodger <goodgerster@...il.com>,
	Robert Hancock <hancockr@...w.ca>,
	linux-kernel@...r.kernel.org, linasvepstas@...il.com,
	"Jeffrey J. Kosowsky" <jeff@...owsky.org>,
	MentalMooMan <slashdot@...eshallam.info>,
	Travis Crump <pretzalz@...hhouse.org>, burdell@...ntheinter.net
Subject: Re: Bug: Status/Summary of slashdot leap-second crash on new years
 2008-2009

> another poster said that NTP packets include information about this 
> month's leap second, so that implies that they could change monthly.

The current rules don't permit this but any rule could be change. However
its unlikely. Current the earth rotation people do this twice a year if
neccessary. It is also too complex to predict significantly (ie years) in
advance when it will be neccessary because the complexity of the tidal
forces involved is beyond simulation.
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