A Holy Blessing
20 + C + M + B + 24
One of the oldest church traditions is done on the day of Epiphany, January 6.
Using chalk, churches write the letters CMB bookended with the calendar year (seen above as 2024) above a doorway or on a path leading up to the church. You can do this as well at your home as a house blessing for the new year!
CMB stands for "Christus mansionem benedicat" — May Christ Bless this Home.
By adding the calendar year you are asking Christ to bless your home in the year.