“‘On the fourteenth day of the first month is the Lord’s Passover.

In the fourteenth day of this month, at twilight, ¹  you are to observe it at its appointed time; you must keep ²  it in accordance with all its statutes and all its customs.” ³ 

They may observe it on the fourteenth day of the second month ¹  at twilight; they are to eat it with bread made without yeast and with bitter herbs.

And they observed the Passover ¹  on the fourteenth day of the first month at twilight in the wilderness of Sinai; in accordance with all that the Lord had commanded Moses, so the Israelites did.