Every Sunday is a commemoration of the resurrection of the Lord Jesus Christ, and has been since the disciples in that first church in Jerusalem began meeting on the first day of the week, back around A.D. 29, after Jesus arose from the dead and showed himself alive among many witnesses!
There is no command in the Bible to set aside one particular Sunday to celebrate the resurrection of the Lord, as we do at Easter, but it was in this season of the year that He arose, well before dawn of the first day of the week nearly 2000 years ago.
The term Easter has come to be about the Christian celebration of the resurrection of Christ in the thinking of most who hear it, although it did not originate that way. The celebration of Easter is even mentioned in the Bible (Acts 12:4).
It was a well-established pagan festival day, celebrating the return of spring, and connected with the mythical Babylonian goddess “Ashtoreth,” who was later referred to as “Eastre” by the Teutonic peoples of ancient Europe. This pagan celebration occurred in the same time of year as the resurrection of Christ. Ancient historian Eusebius wrote that Christians celebrated Easter as the resurrection of Christ from the Apostolic era onward.
Like many other references in our English language, it has largely lost its significance as a pagan celebration, and is generally recognized as the Christian’s celebration of the resurrection of Christ. In truth though, every Sunday we meet together is a celebration of His resurrection as we gather together to worship him.
Acts 1:3 “To whom also he shewed himself alive after his passion by many infallible proofs, being seen of them forty days, and speaking of the things pertaining to the kingdom of God”