Reason #1: Celebrate the fulfillment of the resurrection prophecy in Jesus Christ.
Acts 2:25-27 "For David says concerning Him: 'I foresaw the Lord always before my face, for He is at my right hand, that I may not be shaken. Therefore my heart rejoiced, and my tongue was glad; Moreover my flesh also will rest in hope. For You will not leave my soul in Hades, nor will You allow Your Holy One to see corruption.'"
 
Reason #2: Celebrate the resurrection prophecy that Jesus Christ gave about Himself.
John 2:19-21 Jesus answered and said to them, "Destroy this temple, and in three days I will raise it up." Then the Jews said, "It has taken forty-six years to build this temple, and will You raise it up in three days?" But He was speaking of the temple of His body.
 
Reason # 3: Celebrate the resurrection hope of believers through faith in Jesus Christ.
1 Peter 1:3-5 Blessed be the God and Father of our Lord Jesus Christ, who according to His abundant mercy has begotten us again to a living hope through the resurrection of Jesus Christ from the dead, to an inheritance incorruptible and undefiled and that does not fade away, reserved in heaven for you, who are kept by the power of God through faith for salvation ready to be revealed in the last time.
 
Reason # 4: Celebrate the Christian preaching of the resurrection of Jesus Christ.
Acts 13:30-32 But God raised Him from the dead. He was seen for many days by those who came up with Him from Galilee to Jerusalem, who are His witnesses to the people. And we declare to you glad tidings —that promise which was made to the fathers.
 
Reason # 5: Celebrate the Christian Gospel or good news message of Jesus Christ.
1 Corinthians 15:1-5 Moreover, brethren, I declare to you the gospel which I preached to you, which also you received and in which you stand, by which also you are saved, if you hold fast that word which I preached to you —unless you believed in vain. For I delivered to you first of all that which I also received: that Christ died for our sins according to the Scriptures, and that He was buried, and that He rose again the third day according to the Scriptures, and that He was seen by Cephas, then by the twelve.
 
Reason #6: Celebrate your Christian faith in Jesus Christ that leads to the resurrection.
Philippians 3:8-11 Yet indeed I also count all things loss for the excellence of the knowledge of Christ Jesus my Lord, for whom I have suffered the loss of all things, and count them as rubbish, that I may gain Christ and be found in Him, not having my own righteousness, which is from the law, but that which is through faith in Christ, the righteousness which is from God by faith; that I may know Him and the power of His resurrection, and the fellowship of His sufferings, being conformed to His death, if, by any means, I may attain to the resurrection from the dead.
 
Reason #7: Celebrate Jesus Christ as being the way, the truth, and eternal life with God.
John 11:25-26 Jesus said to her, "I am the resurrection and the life. He who believes in Me, though he may die, he shall live. And whoever lives and believes in Me shall never die. Do you believe this?"
 
Note: For modern-day Pharisees who condemn Easter for its pagan beginnings the following would be appropriate. "What God has cleansed you must not call common." (Acts 10:15)