Passover … Unleavened Bread: These feasts began on the evening before the exodus from Egypt (see Exodus 12:1–28).
Israel had three major festivals:
The Feast of Unleavened Bread, which begins the day after Passover (Deuteronomy 16:16)
The Festival of Weeks (Leviticus 23:15–21)
The Festival of Tabernacles (23:34–43)