This chapter retells the specific commands about how to celebrate the Passover. This recalled the Passover in Egypt, which was an important event in the formation of the nation of Israel. There are several other important festivals described in this chapter. As Yahweh's chosen nation, there must be justice in Israel. Also, Yahweh must be the only God in Israel. He alone is to be worshiped.
This is the first month of the Hebrew calendar. It marks when God brought the people of Israel out of Egypt. It is during the last part of March and the first part April on Western calendars.