The Lord's Day in the apostolic age? -- Continuing traces of the sabbath in later Christian practice -- Sunday in the fourth century -- The Christian week: Wednesdays and Fridays -- The quartodeciman celebration -- The date of the festival -- The development of the triduum -- Pentecost: the great fifty days -- Initiation at Easter -- The emergence of Lent and Holy Week -- Three weeks and forty days -- The development of Lent -- Calculating the forty days -- Holy week in Jerusalem -- December 25: two competing theories -- January 6 in the East -- January 6 in the West -- Advent -- The first martyrs and saints -- Mary: devotion and feasts