The Bible shows how he used the Hebrew calendar outlined in Genesis 1:14 for signs, season, days and years were given by God. There is some amazing link between the moon cycles, eclipses with the feasts of Lord. It will both bless and encourage you how God is working on His calendar and not ours. See related articles we have on
All of these studies should be done on your own and taken to the Lord in prayer. It is compelling.