The lasting ordinance to remember God has done for us

Exodus 12:15-28
Passover has seven days eat bread made without yeast. Do not work at all on these days except to prepare food for everyone to eat.
The Feast of Unleavened Bread, because it was on this very day that I brought your divisions out of Egypt. In first month from the evening of the 14th days until evening of the 21th days.
Israelites obeyed what Moses commanded them.
Why?
After nine plagues people of Israel acknowledges the power of the Lord.
The flat unleavened bread recalls the haste of their departure.
These feasts are to be remember for Israel, became their lasting ordinance for them and their descendants.
How?
Remember what God has done for us and for me!