Deuteronomy 16:1-8 refers to Unleavened Bread rather than Passover (a scribal error, perhaps referring to the season). Ten clues clear up this misconception.
The context of Deuteronomy 16:1-3 indicates the focus of these verses is on the Night to be Observed and the Days of Unleavened Bread rather than the Passover.
Passover takes place at twilight as the 14th of Abib begins. Unleavened Bread begins 24 hours later on the 15th of Abib. The Passover is a preparation day.
Using subterfuge, some proponents of the 15th Passover muddle up otherwise clear, day and night issues by surreptitiously inserting modern English language usage.
The proponents of a 15th Passover discount clear scriptural details and instead speculate. One cannot build doctrines on implication, distortion, and traditions.
At the time of Christ, because of historical deviation, some kept Passover at home at the start of the 14th and others kept it at the Temple at the end of the 14th.
Nine steps had to be included with the Passover observance, all within the house until morning. It takes place between sun's setting and complete darkness.
How does one count to Pentecost when Passover is on a weekly Sabbath, making the Last Day of Unleavened Bread the only other available Sabbath to begin the count?
The Night Much to be Observed is a memorial of the covenant with Abraham, and God's watchfulness in delivering ancient Israel as well as spiritual Israel.
The Bible is full of marriage symbolism. We have been invited to participate in the very Marriage Supper of Jesus Christ—not just as a guest, but as the Bride!