Scofield Reference Notes (1917 Edition)Chapter 9
9:1 And the LORD spake unto Moses in the wilderness of Sinai, in the first month of the second year after they were come out of the land of Egypt, saying,
9:11 The fourteenth day of the second month at even they shall keep it, and eat it with unleavened bread and bitter herbs.
i.e. April; also Numbers 9:5.