to be fair to us the aliens calendar is likely impenetrable as well, especially if they did agriculture. The more I learn about ancient societies the more I lea

to be fair to us the aliens calendar is likely impenetrable as well, especially if they did agriculture. The more I learn about ancient societies the more I learn that calendars were really important and really complicated. It was the hobby of many rich people to stare at the sky and figure out how the stars move based on how the temprature feels and the daylight length. This let them calculate better when to plant/harvest crops, which grow based on the seasons. Calculating the exact number of days including fraction in a year is a nightmare before you figure out the mechanics of how orbits work, which is mindblowingly complicated to do just looking at the sky, and if you get it wrong your food production WILL slowly get worse. Many larger societies had whole quasi state/religous orders whose whole function was to keep the calendar working. Compare for example the mayan calendar. Or the orthodox, or syrian, or basically any culture's calendar. None make sense.