A hole in one of the stones would allow a shaft of light to shine on a slab with markers on it. Viewed at the same time every day, the position of the spot on the analemma would tell you the month.
Incorrect. The stones' inscriptions are "guidelines" for what would make the perfect Earth (as written by the man who commissioned the statue), translated into 8 languages.
https://en.wikipedia.org/wiki/Georgia_Guidestones
Step 1: you're fucked. cry.
https://en.m.wikipedia.org/wiki/Analemma
A hole in one of the stones would allow a shaft of light to shine on a slab with markers on it. Viewed at the same time every day, the position of the spot on the analemma would tell you the month.
https://en.wikipedia.org/wiki/Georgia_Guidestones
...the Devil went down to Georgia.