A new exodus and offering of a Lamb

Lord's Evening Meal Instituted.

Over 15 centuries after the Exodus, on Nisan 14 of the year 33 C.E., Jesus gathered with his 12 apostles in Jerusalem to celebrate the last valid Passover, and then, having dismissed the traitorous Judas, he proceeded to institute the memorial of his death by means of the Lord's Supper, or Evening Meal. (Matthew 26:17-30; 1Corinthians 11:23-25)
Before Nisan 14 passed, he died as the Lamb of God.

On Nisan 16, the day the priest at the temple waved the firstfruits of the barley harvest, Jesus, as the firstfruits of the resurrection, was raised up to life again. (Luke 23:54-24:7; 1Corinthians 15:20).

What do we have to do? Remember?

In obedience to Christ's instructions, "Keep doing this in remembrance of me," the 14th day of Nisan continues to be observed by his followers till this day as the time for memorializing Christ's death. (Luke 22:19, 20)

The Hebrews began their day in the evening, after sunset, and ended it the next day at sunset. The day, therefore, ran from evening to evening. "From evening to evening you should observe your sabbath." (Levites 23:32) This follows the pattern of Jehovah's creative days, as indicated at Genesis 1:5: "There came to be evening and there came to be morning, a first day." (Compare Daniel 8:14).
The Hebrews were not the only ones who reckoned a day from evening to evening; the Phoenicians, Numidians, and Athenians also did so. The Babylonians, on the other hand, counted the day from sunrise to sunrise; while the Egyptians and the Romans reckoned it from midnight to midnight (as is commonly done today).