Here are the definitions of the original Greek words used in the Septuagint that were promised not to cease:
The book of Jubilees provides more information regarding the covenant that our Father in Heaven made with Noah and his descendants. It states Noah’s descendants were to celebrate the first day of the first, fourth, seventh, and tenth months which use to be the first day of the beginning of each season on the old Enoch calendar. These are celebrations based on the sun’s position on earth.
Ancient Time Tracking Tools
The Sidereal Day verses the Tropical Day
Wheel of the Year
Noah’s Descendants Quarterly Festivals
Today we are told these are pagan festivals; however that just means rural people celebrated them. The old Latin definition just meant pertaining to people that lived in rural areas or in the countryside. The country people wanted to continue these festivals; however the Constantine did not want the country or pagan people to do so. The persecution of pagans in the late Roman Empire began late during the reign of Constantine the Great, when he ordered the pillaging and the tearing down of some temples (about 328 AD). The first anti-pagan laws started with Constantine's son Constantius II. These festivals have been labeled pagan ever since. Today our new English definition the word pagan means heathen and some of the things done today at these festivals would be considered heathen since the festivals have been corrupted. People are continually worried about whether they should celebrate pagan festivals or not. The funny thing is that the word pagan is not in our bible. Our bibles do not give us any warning against pagans. Our bible does warn us about heathens though.
For dates of each of these four season festivals, please see this page. Holy Feast Days of Israel