30 Oct
2018
30 Oct
'18
12:28 a.m.
On Monday, 29 October 2018 at 10:19:43 -0400, Clem Cole wrote:
On Mon, Oct 29, 2018 at 4:01 AM Michael Kjörling
<michael(a)kjorling.se>
wrote:
Yes, correct:
$ TZ=America/Los_Angeles date -j 196910292230 +%s
5419800
$ TZ=UTC date -r -5419800
Thu 30 Oct 1969 06:30:00 UTC
So 1969-10-30 05:30 UTC?
I >>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]. If you want to be be 100% accurate and use UTC, then
you would need to
check a precise calendar that had all those details to see how the US had
its clocks set on October 30, 1969. The good news was the transmission
stayed with the same time zone, which as I said was Pacific (UCLA is in Los
Angeles area and SRI in the Bay Area - but both are California - which
follows US, DST rules). The question is what were the rules that were in
effect that night.
That's in the time zone sources:
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
Rule US 1967 2006 - Oct lastSun 2:00 0 S
Rule US 2007 max - Nov Sun>=1 2:00 0 S
So in 1969, DST ended on 26 October.
Greg
Of course, this didn't happen at *exactly* 22:30/6:30, but presumably
nobody at the time thought that people would still be talking about it
50 years later.
Greg
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