It might surprise most, but what we know as Easter was celebrated for many hundreds of years before the birth of Christ. Originally, the Church of God never kept Easter, but Passover. Jesus Christ, His Apostles and His Church kept the Sabbath, and the Holy Days of God (Passover, Unleavened Bread, Pentecost and so on). You will find this mostly recorded in Acts. There are other NT references too.
Acts 12:4 is a mistranslation of the Greek "Pascha," meaning the Passover.
The Church largely became corrupted in the first century AD and began absorbing pagan doctrines, mostly to gain converts.
Easter is named for the Babylonian goddess of fertility, Astarte or Ishtar. It is from here that you get the eggs, rabbits and so on.
In ancient times, egg hunts were held in the name of Astarte, and those women who found an egg were said to be blessed with a child that year.
Easter is not biblical, and it does not commemorate the resurrection of Jesus Christ.