Easter is the most important day in all of human history and here's why:
Since the moment Adam and Eve disobeyed God in the beginning, we have been destined for eternal separation from God forever. There is nothing that we could ever do to remedy our relationship with God, make us "good people" in His eyes, or earn any favor with Him.
As broken people before a perfect God, we deserve death for our sins, we deserve the just payment for our actions, being punishment by God for all of eternity.
BUT GOD who is rich in love & mercy, didn't want that to be the case, He loves you so much that He sent Jesus (who is God) to be born into this world as a human (while still being God), He lived the perfect life of obedience to God that we couldn't ever live, and more than that,
on the cross to pay the penalty for our sins , through His death on the cross the wrath of God was poured out on Jesus so that, for anyone who puts their faith in Jesus, the wrath of God will never be poured out on them.
Jesus didn't stay dead.
He rose from the dead 3 days later, as God's way of saying, His payment was valid, and He did live the perfect life. Now anyone who believes in Jesus for the forgiveness of their sins will be made right with God and we can look forward to a future with Him forever!
We are still imperfect people, but we have a Perfect Savior, Jesus, who did what we could never do, so while we won't be perfect here on earth, we are trusting that Jesus is making us more like Himself until we see Him face to face.