When the date of the dedication or consecration of a church or chapel is known, the Feast of Dedication may be celebrated on that day or the Sunday closest to it. When the date is not known, or when its anniversary falls on Sundays in Advent, Lent, Easter, or on Feasts of Our Lord and other Holy Days taking precedence of Sundays, the Feast of Dedication may be celebrated on 25 October or the Sunday before All Saints’ Day.