The Passover Celebration commemorates the Israelites coming out of Slavery in Egypt You can find it in the Holy Scriptures at Leviticus 23:4-5 and Exodus 12:1-4. It is to occur on the 14th Day of Nisan. A biblical month begins on the sighting of the new moon in Jerusalem, aka Nisan 1 and begins at dust. Counting to the 14th day of that month begins the Passover Celebration.
The Lord sent Moses to lead the children of Israel from Egypt to the Promised Land. When first confronted by Moses, Pharaoh refused to let the people go. After sending nine plagues, the Lord said the firstborn males of every house would die unless the doorframe of that house was covered with the blood of a perfect lamb. That night, the Lord “Passed over” the homes with blood on the door frames. The tenth plague brought death to the firstborn sons of Egypt, even taking the life of Pharaoh’s own son. Finally, Pharaoh let the children of Israel go. Passover was to be a lasting ordinance for generations to Come.
Yeshua, ate the Passover with his disciples, saying that he had eagerly desired to eat this Passover with them before he suffered and that he would not eat it again until the kingdom of God comes , Luke 22:7-16. After the Passover meal, they sang a hymn and went to the Mount of Olives Matt. 26:30. The hymn sung during Passover is the Hallel which includes Psalm 118:22: The stone the builders rejected, Matt. 21:42; 1 Peter 2:7. Yeshua was crucified as the “Lamb of God who takes away the sin of the world”, John 1:29. The Lord’s Supper is a remembrance of his sacrifice as the perfect Passover Lamb and the fulfillment of the new covenant between YHVH and man, Luke 22:20; 1 Cor. 5:7; Eph. 2:11-13. Prophecy of this sacrifice is found in Psalm 22. The Hebrew prophet Isaiah also spoke of the sufferings and sacrifice of the Messiah, Isa 53.
The Gregorian calendar, used by most western nations today, was established by Pope Gregory XIII in 1582. It is a Solar Calendar.
The Biblical Calendar uses both lunar and solar movements. The months are determined by the moon, and the year is determined by the Sun. The Biblical Day begins at Sunset. Determining the true Sabbath Day is marred by traditions of men and is always a major contention between those that seek the true Sabbath Day to Connect and Worship to YHVH.
The new moon, called Rosh Hodesh, sighting to determine each new month can be found in the Scriptures in Num. 10:10; Ps. 81.3. In Exodus 12, YHVH established the order of the months. This is the Creators Calendar and is used to determine the holiday celebrations.
Nisan is also known as the month of Abib. Some biblical years have 13 months. At the end of the 12th month the barley in Jerusalem is tested to determine if it is Aviv. This is an agricultural term that means if the barley can be toasted over fire and the grain eaten it will be ready for harvest on the coming Feast Day of First Fruits. If its not matured enough then a 13th month is implemented which ensures that the offering of First Fruits on Nisan 16 will be ready.
Many men have sought to change the Creators Calendar, some to confuse men of the appointed times to commune with YHVH and others, like the Pharisees, which changed YHVH’s calendar so that as the Jews were put into exile all Jews would know when to worship and when the feast times would be. Many Jews today still use this Takkanoh created Calendar. There are many different views but from my perspective YHVH gave us the Signs in the Heavens and laid out the true Sabbath Day when the Israelites came out of Slavery after passover. Its all a shadow picture of the good things to come for them that search out the truth in YHVH’s Holy Scriptures. Here is the Creators Calendar as I understand it currently. Good Lord willing, I’ll try and make it clearer to you all by laying it over the Solar/Pagan/Gregorian Calendar we currently use today.