I just finished a study on the ancient calendar of the Torah, also why the ancient calendars were 360 days, why the months of those calendars were lunar, how to tell when the first new moon of the year is to then determine the correct time of the Torah festivals throughout the year, what the "new moon" of the Torah looked like, when the different crops become ready for harvest in correlation with the Torah festivals, what "aviv" barley means, why Yeshuah could not have died on a Friday, and when the seven trumpets of Revelation and the seven bowls of Revelation happen in correlation with the autumn festivals of the Torah. Check out the study here, The Original 360 Day Calendar of the Torah, New Moons, and the True Appointed Time and Fulfillment of the Festivals of the Torah | Wisdom of God