The Church moved the Sabbath to Sunday in anticipation of the NFL.
Excellent proof of God's foreknowledge!
It was explained to me that the reason for Sunday worship is that Saturday/Sabbath was considered too holy for even the church leaders/priests to work, so Sunday became the day of worship after a day of rest.
I’m not saying this is what happened, but it is an explanation I received once. It sounds plausible to me, but I’m so gullible...