On Monday, 29 October 2018 at 11:34:50 -0400, John Labovitz wrote:
On Oct 29, 2018, at 10:19 AM, Clem Cole
Ah, damn, you got there first. Thanks for the zdump reference.
>>think<< it is more likely 06:30 UTC, as IIRC Daylight Saving
Time finished mid-month so I think it would have been UTC+8:00 [not
+7:00 which it would be now]. That said, Nixon [...shutter...] was
in office and he put the US went on DST in the winter at some point
due to the oil crisis (but I thought that was a year or so later).
I remember it all happening at the time - but I can do not put
precise dates on any of it.
According to tzdata...
$ zdump -v America/Los_Angeles | grep 1969
America/Los_Angeles Sun Apr 27 09:59:59 1969 UTC = Sun Apr 27 01:59:59 1969 PST isdst=0
America/Los_Angeles Sun Apr 27 10:00:00 1969 UTC = Sun Apr 27 03:00:00 1969 PDT isdst=1
America/Los_Angeles Sun Oct 26 08:59:59 1969 UTC = Sun Oct 26 01:59:59 1969 PDT isdst=1
America/Los_Angeles Sun Oct 26 09:00:00 1969 UTC = Sun Oct 26 01:00:00 1969 PST isdst=0
...it appears that DST was *not* in effect on October 30, 1969.
A caveat: tzdata???s docs warn that dates before
1970 may not be
accurate. But because I???m fascinated by the cultural history
embedded within that database, I downloaded the latest tzdata files
to check. The relevant rules are in the ???northamerica??? file:
Rule NAME FROM TO TYPE IN ON AT SAVE LETTER
Rule CA 1948 only - Mar 14 2:01 1:00 D
Rule CA 1949 only - Jan 1 2:00 0 S
Rule CA 1950 1966 - Apr lastSun 1:00 1:00 D
Rule CA 1950 1961 - Sep lastSun 2:00 0 S
Rule CA 1962 1966 - Oct lastSun 2:00 0 S
Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02
-8:00 US P%sT 1946
-8:00 CA P%sT 1967
-8:00 US P%sT
Yes, but the key here is the US in the last line. That refers to the
rules further up (US) that I referred to.
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