Sabbath

Sabbath, the seventh day of the week, observed by the Jews as a day of “rest” from all work and “holy to the Lord,” as His day, specially in commemoration of His rest from the work of creation, the observance of which by the Christian Church has been transferred to the first of the week in commemoration of Christ's resurrection.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)