When mushroom farming I just looked here and accounted for the day before and after the main 4 phases and have never had a problem.
*** Oh if you click on a day it shows you if it's waxing or waning crescent or gibbous.
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When mushroom farming I just looked here and accounted for the day before and after the main 4 phases and have never had a problem.
*** Oh if you click on a day it shows you if it's waxing or waning crescent or gibbous.
Is there any chance you'd consider wrapping that in a leap-year-aware date range loop and post the results for the next several years as a text file? Then we have an authoritative, simple answer, and all you have to do is never ever change any code that might affect it ever again, forever? What could go wrong?
This has a chart of the moon phase dates for a hundred years: http://astropixels.com/ephemeris/moo...es2001gmt.html
Then it's +/- 1 day around the full/new/first q/last q, and fill inbetween. Thinking about adding this to the wiki. (Would just need to do the data entry for the dates each month and a bit of #expr (math and syntax)).
Here also is some general info on why the synodic month varies (so why a simple "Seconds elapsed since some fixed time / Period of synodic month" model isn't sufficient): http://astropixels.com/ephemeris/moo...month2001.html
Edit:
Proof of concept at
http://wiki.projectgorgon.com/wiki/U...dbox/MoonPhase
This should chart the PG moon phases for today and the next 3 days, until the next full moon on Oct. 31, 2020.