[tz] tz Digest, Vol 22, Issue 13

ruggety at ovi.com ruggety at ovi.com
Sat Jul 20 09:09:40 UTC 2013

Why the change?

Sent from my Nokia phone

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Date: Tuesday, July 16, 2013 12:00:03 PM GMT+0000
Subject: tz Digest, Vol 22, Issue 13

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Today's Topics:

   1. Day length in the news (Arthur David Olson)
   2. Saving electricity via horizontal time zones (Paul Eggert)


Message: 1
Date: Mon, 15 Jul 2013 16:42:33 -0400
From: Arthur David Olson <arthurdavidolson at gmail.com>
To: "tz at iana.org" <tz at iana.org>
Subject: [tz] Day length in the news
	<CAJvZEYkKfJOnvs=ZbaHv6sVCDa+kQ4fTFbF+aYe4DfCFOKgJBw at mail.gmail.com>
Content-Type: text/plain; charset="iso-8859-1"

(Probably of marginal interest to most folks on the list.)

>From the on-line Washington Post: "Stutters in Earth's spin changed length
of days slightly"

The Post article stems from R. Holme & O. de Viron, "Characterization and
implications of intradecadal variations in length of day,"
Nature 499, 202-204 (11 July 2013);
http://www.nature.com/nature/journal/v499/n7457/full/nature12282.html (only
abstract is available for free).

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Message: 2
Date: Mon, 15 Jul 2013 14:41:05 -0700
From: Paul Eggert <eggert at cs.ucla.edu>
To: Time zone mailing list <tz at iana.org>
Subject: [tz] Saving electricity via horizontal time zones
Message-ID: <51E46C71.7010402 at cs.ucla.edu>
Content-Type: text/plain; charset=UTF-8

A recent paper by Felix Weinhardt of the
Spatial Economics Research Centre of the
London School of Economics and Political Science
argues that daylight saving time increases electricity
use in the northern part of the U.S., but decreases
its use in the south.  Weinhardt proposes horizontal
time zones to ameliorate this, and estimates that their
use would save the U.S. about 0.1% of its total GDP.

Weinhardt F.
The importance of time zone assignment:
evidence from residential electricity consumption.
SERC Discussion Paper 126 (January 2013).


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