This was known, to greater precision, a century before Julius Caesar: https://csuitemind.com/quotes/i-have-composed-a-book-on-the-length-of-the-year-in-which-i

This was known, to greater precision, a century before Julius Caesar: https://csuitemind.com/quotes/i-have-composed-a-book-on-the-length-of-the-year-in-which-i https://csuitemind.com/quotes/i-have-composed-a-book-on-the-...