[LEAPSECS] USWP7A docs for 2013 September meetings

Tony Finch dot at dotat.at
Wed Aug 14 07:45:05 EDT 2013

Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:


> These offsets have a granularity of about an hour, and many places

> change twice a year, to put the noon-sun a more convenient place

> than south for part of the year. (BTW: It'll be interesting to see

> how increasing global temperatures will affect DST policies.)

DST exists to make the time of sunrise more convenient. Before astronomers
started using the noon transit to set clocks, sunrise was the important
benchmark. From the human factors point of view, fixing the clocks to noon
is awkward and uncomfortable.

f.anthony.n.finch <dot at dotat.at> http://dotat.at/
Forties, Cromarty: East, veering southeast, 4 or 5, occasionally 6 at first.
Rough, becoming slight or moderate. Showers, rain at first. Moderate or good,
occasionally poor at first.

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