Why it happens-(what happend in the life of Jesus) Easter Sunday?

Easter Sunday is celebrated because it is the day Jesus was ressurected from the dead. Jesus died on the cross for us and 2 days later, he rose from the dead. On Easter, we express our joy and happiness that Jesus is with us again. Easter is also known as the most important feast/holiday in the Catholic religion. Holy Week: Holy Thursday-The Last Supper Good Friday-Jesus died on the Cross Holy Saturday-We begin to celebrate Jeusus' ressurection on the eve of Easter. Hope this helps! :o)