Question: When does Passover begin? YOU SHOULD CELEBRATE PASSOVER ON THE FOURTEENTH DAY OF ABIB. (Before sunset but usually extends into the fifteenth of Abib) Leviticus 23:5 On the fourteenth day of the first month (full moon) at evening (between sunset/darkness) is יהוה Passover. Deuteronomy 16:1 Observe את־ the month of Abib and keep the Passover to ליהוה your Elohim: for …