The 14th day of the month of Nisan (see Bible Months) is one of the most important dates of all Bible History. It marked the time of Passover from which the Israelites began their Exodus from Egypt, and centuries later, the time of the sacrifice of Jesus Christ, the "Lamb of God." The early Christian church continued to observe Passover, on the 14th of Nisan, as Jesus Christ did Himself all through His life, until the Babylonian/Roman festival of Easter (of which many Christians today are often shocked to learn was named after the Babylonian idol Ishtar, and later, eastre, the Anglo-Saxon goddess of light, or spring) was officially enforced upon the Christian-professing world by the Roman Empire who invented their own version of Christianity (see Ancient Empires - Rome). The Easter of Acts 12:4 in the otherwise excellent King James Version should have been translated as Passover (as most other translations do), since that is the word, and the intended observance, that was originally written in the Scriptures.
Passover and The Lamb Of God
The Lord instituted Passover at the time of the Israelites' exodus out of Egypt. It was intended as a foreshadow of the Lamb of God, who would deliver spiritual Israel (see Physical and Spiritual Israel) out of the bondage to sin (see also Travail):
"Then Moses called for all the elders of Israel, and said unto them, Draw out and take you a lamb according to your families, and kill the Passover. And ye shall take a bunch of hyssop, and dip it in the blood that is in the basin, and strike the lintel and the two side posts with the blood that is in the basin; and none of you shall go out at the door of his house until the morning. For The Lord will pass through to smite the Egyptians; and when he seeth the blood upon the lintel, and on the two side posts, The Lord will pass over the door, and will not suffer the destroyer to come in unto your houses to smite you. And ye shall observe this thing for an ordinance to thee and to thy sons for ever." (Exodus 12:21-24 KJV)
Jesus of Nazareth (see also Nazarene) existed as the "Lamb of God," to be sacrificed at, and as, Passover.
"The next day John [see John's Last Days, also The Origin of Baptism] seeth Jesus coming unto him, and saith, Behold the Lamb of God, which taketh away the sin of the world." (John 1:29 KJV)
"Purge out therefore the old leaven, that ye may be a new lump, as ye are unleavened [see Unleavened Bread]. For even Christ our Passover is sacrificed for us" (1 Corinthians 5:7 KJV)
After His Sacrifice, the Lamb of God took His place before God, where He remains until His return (see also What Is Jesus Christ Doing Right Now?):
"And I beheld, and, lo, in the midst of the Throne and of the four beasts, and in the midst of the elders, stood a Lamb as it had been slain, having seven horns and seven eyes, which are the seven Spirits of God sent forth into all the earth. And when he had taken the book, the four beasts and four and twenty elders fell down before the Lamb, having every one of them harps, and golden vials full of odours, which are the prayers of saints. And they sung a new song, saying,
"Thou art worthy to take the book, and to open the seals [see The Seven Seals] thereof: for Thou wast slain, and hast redeemed us to God by Thy blood out of every kindred, and tongue, and people, and nation; And hast made us unto our God kings and priests: and we shall reign on the earth."
"And I beheld, and I heard the voice of many angels round about the Throne and the beasts and the elders: and the number of them was ten thousand times ten thousand, and thousands of thousands; Saying with a loud voice, Worthy is the Lamb that was slain to receive power, and riches, and wisdom, and strength, and honour, and glory, and blessing." (Revelation 5:6-12 KJV)
At The Return Of Jesus Christ:
"And I looked, and, lo, a Lamb stood on the mount Sion [i.e. Mount Zion, see Who, What or Where Is Zion?, also Daughter of Zion], and with Him an hundred forty and four thousand, having His Father's name written in their foreheads."
"And I heard a voice from heaven, as the voice of many waters, and as the voice of a great thunder: and I heard the voice of harpers harping with their harps: And they sung as it were a new song before the Throne, and before the four beasts, and the elders: and no man could learn that song but the hundred and forty and four thousand, which were redeemed from the earth. These are they which were not defiled with women; for they are virgins. These are they which follow the Lamb whithersoever He goeth. These were redeemed from among men, being the firstfruits unto God and to the Lamb. And in their mouth was found no guile: for they are without fault before the Throne of God."
"And I saw another angel fly in the midst of heaven, having the everlasting Gospel to preach unto them that dwell on the earth, and to every nation, and kindred, and tongue, and people, Saying with a loud voice, Fear God, and give glory to Him; for the hour of His judgment is come: and worship Him that made heaven, and earth, and the sea, and the fountains of waters." (Revelation 14:1-7 KJV)
Fact Finder: Why did God forsake The Lamb of God at the very moment of His Sacrifice?
See Eloi, Eloi, Lama Sabachthani?