An important fact to realize is that there were eight basic premises concerning Passover, the seven days of Unleavened Bread, and Pentecost which were almost universal and formed the foundation upon which the overwhelming majority of the early Christian assemblies, whatever system they followed, stood:
1. The Passover celebration was required for all Christians.1
2. The Christian Passover was an innovation in that it did not require any ritualistic animal sacrifice.2
3. The Passover lamb of the Torah and its sacrifice was a typology of the death of the messiah, the true Passover lamb of Yahweh.3
The Festival of Passover and Unleavened Bread along with the Festival of Shabuath (Pentecost) were not just Jewish concerns.
Today, few English-speaking Christians, largely due to their long practiceof glossing the Hebrew word Phasekh (Passover) with the name Easter and their abandonment of the Festival of Pentecost, realize that Passover and Pentecost were the chief religious observances of the early Christian assemblies.
In one form or another, all early Christian groups not only observed the Passover and Pentecost but calculated the Passover observance in connection with the seven days of Unleavened Bread.