448 (circ.). The Calendar of Bishop Polemius Silvius of Sion for Southern Gaul.
452. Discovery of the head of John the Baptist, and its translation to Constantinople on 24th Feb.
470 (circ.). Rogation procession introduced by Mamertus of Vienne.
491. Perpetuus, Bishop of Tours, orders the Advent fast. The two Festivals of the Nativity and Beheading of the Baptist celebrated in Tours.
492. The Festival of SS. Peter and Paul on 29th June adopted in Constantinople.
492-496. Pope Gelasius appoints the ordination of priests to take place at the Embertides.
500 (circ.). The monks of Palestine keep the annual commemoration of the Holy Mother of God (μνημὴ τῆς θεοτόκου) in their monasteries.
504. The Emperor Anastasius has the relics of the Apostle Bartholomew brought to the city of Daras, on the borders of Mesopotamia, which he had fortified.
506. The Council of Agde (canon 63) includes the Nativity of St John Baptist among the festivals of obligation.
534. Justinian I. renews the prohibition against the sittings of the law courts on 25th Dec. and 6th Jan.