[LEAPSECS] The ends we seek

Ian Batten igb at batten.eu.org
Sun Jan 22 04:24:45 EST 2012

On 21 Jan 2012, at 23:42, Tony Finch wrote:

> On 21 Jan 2012, at 18:53, Ian Batten <igb at batten.eu.org> wrote:


>> allow DUT1 to grow to 31 minutes, and then allow anyone who wants to reduce DUT1 to 29 minutes to change their time zone


> No that isn't how it works. DUT1 is the difference between UT1 and UTC. It has nothing to do with local time, so it cannot be affected by a change of timezone. The relevant comparison is between UTC plus TZ offset, and UT1 plus longitude divided by fifteen.

Sorry, yes, that's why I intended to mean. I meant the offset between UTC as modified by time zone (ie civil time disseminated by radio, television and computers), and local apparent solar time as experienced by voters looking up in the sky.


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