On the twentieth day of the second month in the second year [since leaving Egypt], the cloud [of the Lord’s presence] was lifted from over the tabernacle of the Testimony,
The Lord spoke [by special revelation] to Moses in the Wilderness of Sinai in the Tent of Meeting (tabernacle) on the first day of the second month in the second year after the Israelites came out of the land of Egypt, saying,
On the fourteenth day of the second month [thirty days later] at twilight, they shall observe it; they shall eat it with unleavened bread and bitter herbs.
They observed the Passover 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.