[tz] Chile TZ rule 1942 June superfluous? PS
eggert at cs.ucla.edu
Sun Mar 29 18:46:14 UTC 2015
Alois Treindl wrote:
> PS: on second thought, could it be that the lines for 1942 are generally in error:
> Rule Chile 1942 only - Jun 1 4:00u 0 -
> Rule Chile 1942 only - Aug 1 5:00u 1:00 S
> Rule Chile 1946 only - Jul 15 4:00u 1:00 S
> Rule Chile 1946 only - Sep 1 3:00u 0:00 -
> They make no sense, because according to this,
> - Jun 1942 line is superfluous
No, because according to the database Chile was on daylight-saving time (UTC-4)
from 1932-09-01 05:00 UTC until 1942-06-01 04:00 UTC, so that line is needed for
Chile to exit DST.
> - Aug 1942 sets DST in force until next cancellation of DST in Sep 1946,
> - JUL 1946 line would be superfluous, as well.
Yes, that's right. The line mentioning "Jul 15" can be removed without changing
the meaning of the data. I don't know why that line is there, but I suppose we
can remove it.
> when I look at the reference, http://www.horaoficial.cl/historia_hora.html
> it does not contain anything about DST in 1942.
This entry was contributed by Jesper Nørgaard Welen in 2006; please see:
I'll CC: this message to him to see if he can provide insight, though we haven't
heard from Jesper for a while so we may not get a response here. I did not
check horaoficial.cl myself. Possibly it has changed since 2006, possibly there
were transcription errors. Either way, we should fix it.
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