[LEAPSECS] RIP dmr, -893400000 to 1318100000

Steve Allen sla at ucolick.org
Thu Oct 13 18:41:12 EDT 2011

On Thu 2011-10-13T22:32:14 +0000, Poul-Henning Kamp hath writ:

> Some weeks later they realized the timezone/DST issue, and

> changed the definition to ...00:00 UTC, and yes, he said "UTC"

> and I asked if the said "UTC" or "GMT" back then, and he said

> "It was always UTC".

WWV and WWVH broadcasts used the term GMT until 1974-01-01T00:00:00.

In 1970 CCIR Recommendation 460 did not use the term UTC.
The first use of UTC by CCIR happened with Rec 460-1 which was
approved at the Plenary Assembly later in 1974.

Before that time the only use of UTC was in obscure documents
of the time service bureaus and the IAU.

So while interpreting the memories of old guys it matters
when the unix system decided to go to 32 bit count of seconds,
because it could not reasonably have been before 1974.

Steve Allen <sla at ucolick.org> WGS-84 (GPS)
UCO/Lick Observatory--ISB Natural Sciences II, Room 165 Lat +36.99855
1156 High Street Voice: +1 831 459 3046 Lng -122.06015
Santa Cruz, CA 95064 http://www.ucolick.org/~sla/ Hgt +250 m

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