How is the Moon Phase interpreted

[ISY4Me]

I have the Sun Nodeserver running, but the Moon Phase just reports a number... right now it is showing 18.

I have looked for some documentation for this NS and I can not find a valid link.  Any input appreciated.

[Geddy]

@ISY4Me not seeing anything in the GitHub reademe 

https://github.com/UniversalDevicesInc-PG3/udi-sun-poly/blob/master/README.md

Maybe @bpwwer might know…looks like he made the conversion to PG3.

[Ross]

@ISY4Me I just downloaded the NS.  My Moon Phase number is now 21.34 (at 7:10am Pacific on Jan 4,2023).  It should be the age of the moon (in days) since the last new moon.  However, I just searched online and the moon is currently 22.55 days old.  So, the number doesn't make sense to me.  The azimuth and elevation do appear reasonable; however, I don't understand Zenith.  I think we should monitor the moon phase until the next new moon on Jan 11 (3:57am Pacific) and see if it starts over.  I don't know enough about NodeServers to see what math it's using.

Here's an explanation of the Age of Moon (sorry if you already knew this): https://in-the-sky.org/article.php?term=age_of_moon.

If you don't mind: when I clicked on More Info, I just got a Not Found page.  Did you use meters or feet for your elevation?

Ross

[ISY4Me]

Thank you @Ross.   Your response helped me understand the basics… I was not even close to thinking age/time since last new moon.