That’s not a biblical holiday.
umm are you stupid, thats literally a Biblical feast. Here are a few reason we celebrate it,
1. God delivered the Jewish people from 400 years of slavery
2. God showed His power through the miracles surrounding Passover
3. God reaffirmed His covenant with Abraham and further set apart the Jewish people as His Chosen People
4. God called the Jewish people out to give them a Land of their own
5. God established a watershed for the Jewish people and an inheritance of faith to pass on
6. God revealed a prophetic glimpse of the promised Messiah’s sacrificial death
By God’s sovereign design, the Feasts of Israel established in Leviticus 23 contain a prophetic shadow of God’s redemptive plan for mankind. Within Passover is the picture of the Messiah’s death to deliver us from the bondage of sin.
The final plague in Egypt was the death of the firstborn of all households. God revealed to Israel the one way they would be spared: They were to sacrifice an unblemished lamb and brush its blood on the lintel and doorposts of their homes. Only then would the Angel of Death pass over their homes and spare their firstborn.
1 Corinthians 5:7 tells us that “Messiah, our Passover Lamb, has been sacrificed.” Yeshua’s (Jesus’) shed blood covers our sin, and His sacrificial death on our behalf – when received in faith – delivers us from the bondage of sin.
As Jewish families come together at Passover, they remember and teach the next generation about the event that delivered them as God’s people. As Messianic Jews celebrate Passover, they also celebrate the eternal deliverance provided by Messiah Yeshua. Messianic jews are jews that believe that Jesus Christ is the Messiah, because not all Jews believe that, but the Jews that did believe is the Messiah are called messianic Jews. But all Christians celebrate it because
Galatians 3:28-29 King James Version (KJV)
28 There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.
29 And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.
So I hope you understand it is a Biblical feast!!