Christians in the early churches met together often (Acts 2:46; Hebrews 10:25). Although the frequency of meetings varied from place to place, the common practice seems to have been that all the Christians in a church met together at least on the first day of each week (Acts 20:7; 1 Corinthians 11:20; 1 Corinthians 16:2). By the end of the first century, Christians commonly referred to the first day of the week as the Lord’s day, probably because it was the day on which Jesus rose from the dead as the triumphant Lord (John 20:1; John 20:19; cf. Acts 2:36; Romans 1:4; Philippians 2:9-11). (Concerning the difference between the Lord’s day and the Jewish Sabbath see SABBATH.)