The practice of observing the Divine Liturgy on the first day of the week has its origin in Apostolic times. Then, the first day of the week was a day of special observance for the Christian community as it assembled to celebrate the breaking of the bread as indicated in Acts 20:7 and [[I Corinthians|I Cor]] 16:2. Later, the ''[[Didache]]'' of the second century gives the injunction: ''"On the Lord's Day come together and break bread. And give thanks, after confessing your sins that your sacrifice may be pure."'' The Christian writers St [[Justin Martyr]] and [[Tertullian]] of the third century mention assembling for worship on the first day of the week. By the fourth century the practice of the earlier times of setting aside first day of the week for assembly and rest began to be codified in both civil and church [[canon]]s and specifically for the Orthodox Church in the canons of the Council of Nicea.