The Jews were the first Christians to celebrate Easter. They were the first to celebrate Jesus resurrection. When Jesus has resurrected, and all the Jews had found out, There had been a big celebration they have called Easter. The of Easter has been fixed to celebrate in the early spring because the Church, which believed that the resurrection had occurred on a Sunday, the First Council of Nicaea in 325 determined that Easter should always fall the first Sunday after the first full moon. Easter didn't have a fixed date yet, but was proximate to the full moon, which coincided with the start of Passover on the 15th of the Hebrew month Nissan.
Easter, a holiday that celebrates Jesus Christs's resurrection from the dead, is Christianity’s most important holiday. It has been called a move able feast because it doesn’t fall on a set date every year, as most holidays do. Instead, Christian churches in the West celebrate Easter on the first Sunday following the full moon after the vernal equinox on March 21. Therefore, Easter is observed anywhere between March 22 and April 25 every year.