This is a calendar of religious activities. Four festivals of unleavened breads, harvest, weeks, and booths. The calendar for Passover was set to be when the barley is ripe. (7 times 7 weeks till the barley is at the right level of ripeness. Some people see Jesus in these festivals. We followed some sort of calendar which may follow some sort of these kind of festivals. Al said that although Constantine made ok to be christian, it was at Thessaloniki when christian Jews became untaxed. This was when lots of people became christian. Moses imposed an order on the people and is really the beginning of Judaism. In chapter 17, a judicial system is established with punishments and hierarchy of rulers. Hither to the Lord has chosen us. God said they could have kings, but this was actually written in the time of kings. Look in Exodus 20:22-24 for more about kings. There are penalties for not obeying the Lord.