Enoch explains the year is 364 days. Jubilees agreed. And there is a calendar called Zadokite. The significance of 364 and Zadokite is they respect the necessity to keep the year a multiple of 7. This anchors certain feasts the the proper day of the week.
One thing you can be sure of, the "Hebraic" lunar calendar is wrong, and the modern Roman calendar is also wrong.
But we can reconcile the time with the Word and praying attention to the Sun, Moon and Stars.
I just don't think we should dismiss Enoch's testimony. And recognize the 7 day base unit of the year.