The Lord’s Day in Christianity is generally Sunday, the principal day of communal worship. It is observed by most Christians as the weekly memorial of the resurrection of Jesus Christ, who is said in the canonical Gospels to have been witnessed alive from the dead early on the first day of the week.
Both the historical and biblical record reveal the Lord’s Day was the chosen gathering day for distinctly Christian worship because it was the day Jesus rose from the dead. Every Sunday the church gathers, then, it remembers and celebrates the resurrection of Jesus.