'Twilight' in the Bible

You must observe it at its appointed time on the fourteenth day of this month at twilight; you are to observe it according to all its statutes and ordinances.”

and they observed it in the first month on the fourteenth day at twilight in the Wilderness of Sinai. The Israelites did everything as the Lord had commanded Moses.

Such people are to observe it in the second month, on the fourteenth day at twilight. They are to eat the animal with unleavened bread and bitter herbs;

Offer one lamb in the morning and the other lamb at twilight,

Offer the second lamb at twilight, along with the same kind of grain offering and drink offering as in the morning. It is a fire offering, a pleasing aroma to the Lord.