The Origin and History of Easter
Easter is an important day celebrated to observe the resurrection of Jesus Christ from the dead, on the third day after his crucifixion. So that is also called as Easter Day, Easter Sunday, Resurrection Day or Resurrection Sunday that observes not only resurrection of the Savior but also life and death.
In the year 325 AD, the great Roman Emperor Constantine convened together the early Christian leaders from across Europe and the Middle East at the Council of Nicaea where they set some doctrines and dates of important Christian events, and Easter was originally decided there. Ever since then, Easter has been celebrated as the holiest festival by all Christians in all corners of the world.