Chalking the Sunday School door
Blessing the home on or near the feast of Epiphany is a tradition that dates from the middle ages.
Using chalk, we mark our doorways with the inscription 20+C+M+B+15, calling to mind the magi, traditionally named Caspar, Melchior, and Balthazar, who journeyed far from their homes to Bethlehem in search of Jesus. The letters also stand for Christus Mansionem Benedicat (May Christ bless this house).
(The “+” signs are crosses, not addition symbols)