The beginning of the Twelve Days of Piety is a holiday Reform Unitarianism shares with other Christians: All Hallows Day, the commemoration of all Saints, known and unknown.

On this day, we honor those who have died after long and pious lives, or who have sacrificed their lives for a good and just cause. For the Reform, this means not only a list of officially accepted Saints, but anyone who has expressed a remark-worthy excess of virtue in the way they lived or died.

The second day, All Souls Day, is our Memorial Day, when we honor all of the departed and meditate on the meaning of death.