The New Testament book of Acts mentions 84 different Sabbaths observed by the apostles, all of them more than 14 years after the resurrection of Jesus.

Acts 13:14, 42, 44:     2 Sabbaths at Antioch
Acts 16:13:                  1 Sabbath at Philippi
Acts 17:2:                     3 Sabbaths at Thessalonica
Acts 18:4, 11               78 Sabbaths at Corinth
Total 84 Sabbaths celebrated by Christ’s followers

John, the last of the twelve apostles to die, wrote five books of the Bible—one gospel, three epistles, and the prophetic book of Revelation. He died about A.D. 100, some 70 years after the resurrection of Jesus. Interestingly enough, nowhere in all of his writings does he speak of a change of the Sabbath from the seventh to the first day of the week. In fact, John himself kept the Sabbath. He wrote:

“On the Lord’s Day I was in the Spirit.”
—Revelation 1:10.

According to Jesus, the Lord’s Day is the Sabbath:

“The Son of Man is Lord of the Sabbath.”
—Matthew 12:8.

A search of the Scriptural evidence reveals that the apostles made no attempt to change God’s day of rest from the seventh to the first day of the week. The New Testament mentions the first day of the week only eight times. In none of these instances is the first day of the week spoken of as a holy day, nor is it even hinted that we should set it aside as a day of worship.