I'm immediately reminded of NetHack [1] (which you can play online here [2])! Real-life phase of the moon has a small but important effect on gameplay in NetHack. The public game server on alt.org even tracks the phase of the moon to provide a handy reference.
A little bit disappointing to discover that the code from the article does not actually depend on the phase of the moon. I'm really interested to see the other stories here where it actually is the case that the phase of the moon is affecting people's code.
Slightly related, I once wrote code for the old Kill Screen site that subtly altered the graphics of a review of a game themed around lunar stuff based on the current phase of the moon.
God bless gusts of random math people leave about.
A little bit disappointing to discover that the code from the article does not actually depend on the phase of the moon. I'm really interested to see the other stories here where it actually is the case that the phase of the moon is affecting people's code.
[1] https://www.nethack.org
[2] https://alt.org/nethack/