Kepler
Cornell Big Red
Somebody, I dunno if it was the Romans, had a set calendar of 12 30-day months, which left you with 5.25 days leftover at the end of the year. They simply made these "outside of time," and ran with it. You couldn't work or fight or trade, so people just partied. It was all under a religious festival but it was basically an annual global fuckfest.I believe on the old calendar you ran into the same problem you run into on the Jewish calendar where a Leap Day wasn't enough. Lunar based calendars require Leap Months over a certain amount of time (2-3 years) because they only last roughly 354 Days.
And then the stupid Christians ruined it. Fuck you, Jesus.