Back in the day, all civilizations literally planted, tilled then harvested their crops based on the moon's phases
On top of that, the sun/moon/stars are the only reason that we as humans can effectively conceptualize "time"
It's another reason why I firmly believe in intelligent design. I could see if 1 celestial body randomly formed to a perfect point, where we were able to measure it's fixed movements then build clocks from that, but the moon regulates the block of time we refer to as a month, the sun and moon regulate the block of time that we refer to as a day, and the stars regulate the block of time that we refer to as a year
That's multiple bodies moving on fixed paths that match up with each other, and they allow humans to form extremely accurate clocks, and thus do long term things like record history/record birthdays/harvest crops/pay bills/predict menstrual cycles
Menstrual cycles are another major function that I think it closely tied to the moon. A lot of females agree too /shrug