hi! very good job! this is so matematically elegant :) love the circular shape and general "esoteric" flavour.
did you plan to make a REAL lunar calendar? as you may know, a month is like 29.5 days, a solar year has 12.X months, so the last month starts in a solar year and ends in the next. it takes 19 years to complete the whole cycle, I mean, for a NewYearFullMoon to be again on the first day of the solar year. I think all of this is so intriguing!