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A revised Sunrise/Sunset program - Matt Agajanian - 11-10-2023 02:00 AM
Hi all.
Since Daylight Saving Time has shifted to 1st Sunday in November and 2nd Sunday in March, is there a new version of a Sunrise/Sunset program for the 67, 15C, 42S, or 34C, or even the 33S/35S?
RE: A revised Sunrise/Sunset program( - acapde - 11-10-2023 05:21 AM
(11-10-2023 02:00 AM)Matt Agajanian Wrote: Hi all.
Since Daylight Saving Time has shifted to 1st Sunday in November and 2nd Sunday in March, is there a new version of a Sunrise/Sunset program for the 67, 15C, 42S, or 34C, or even the 33S/35S?
Hi,
This program (https://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/articles.cgi?read=1246) uses GMT so it's not affected by DST.
Best regards.
RE: A revised Sunrise/Sunset program - Dave Britten - 11-10-2023 02:04 PM
Most (all?) of the sunrise/sunset programs I've found either work entirely in UTC, or require you to supply your current time-zone offset to display results in local time, e.g. -5 for EST and -4 for EDT. So DST changes shouldn't be an issue.
RE: A revised Sunrise/Sunset program - Matt Agajanian - 11-10-2023 07:55 PM
(11-10-2023 02:04 PM)Dave Britten Wrote: Most (all?) of the sunrise/sunset programs I've found either work entirely in UTC, or require you to supply your current time-zone offset to display results in local time, e.g. -5 for EST and -4 for EDT. So DST changes shouldn't be an issue.
Thanks for the 35S version. With 33s, 67, 15C, etc. labels I can easily adapt the program. That way I have all versions.
RE: A revised Sunrise/Sunset program - HP67 - 11-12-2023 02:52 PM
(11-10-2023 02:00 AM)Matt Agajanian Wrote: Hi all.
Since Daylight Saving Time has shifted to 1st Sunday in November and 2nd Sunday in March, is there a new version of a Sunrise/Sunset program for the 67, 15C, 42S, or 34C, or even the 33S/35S?
Hi,
I have written a few implementations of this one, https://edwilliams.org/sunrise_sunset_algorithm.htm
Seems to match published times.