Easter Sunday is a Christian holiday that commemorates the resurrection of Jesus Christ. It is considered the most important event in Christian theology and is celebrated on the first Sunday following the first full moon after the vernal equinox.

The origins of Easter can be traced back to early Christianity, with the name "Easter" possibly derived from the Anglo-Saxon goddess Eostre or the Old High German word "ostara," both associated with spring and fertility.

The holiday's historical significance lies in its connection to the crucifixion and resurrection of Jesus, as recounted in the New Testament of the Bible. Easter marks the culmination of Holy Week, which includes events like Palm Sunday, the Last Supper, and Good Friday. Over the centuries, various traditions and customs have been added to the celebration, including the Easter bunny and egg hunts, which have both religious and pagan roots.

From a historical perspective, Easter Sunday symbolizes the Christian belief in the victory of life over death and is a central event in the Christian calendar. It has evolved over time to incorporate both religious and secular elements, making it a widely celebrated holiday around the world.