“The ancient Egyptian calendar – a civil calendar – was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus an intercalary month of five epagomenal days treated as outside of the year proper. Each season was divided into four months of 30 days.”
There were two in The Bay Area in the early 2000s: wet and dry. Prolonged drought has made us a one-season region, talking about four seasons like other areas.
The Longest Year in Human History (46 B.C.E.) - https://youtu.be/fD-R35DSSZY gets into the "why the year we have is designed the way it is" ... though it takes 22 minutes to get to that part.
It wasn't really better as the 30 * 12 + 5 approach needed manual application of the + 5... which is what the new calendar was trying to avoid.
Ancient Egyptian :-)
https://en.wikipedia.org/wiki/Egyptian_calendar:
“The ancient Egyptian calendar – a civil calendar – was a solar calendar with a 365-day year. The year consisted of three seasons of 120 days each, plus an intercalary month of five epagomenal days treated as outside of the year proper. Each season was divided into four months of 30 days.”