With Sundays added to the 37 mandatory feast days, there were many days during which the population was required to attend Mass and abstain from working. During some periods, however, it was difficult to interrupt the various daily tasks—particularly those associated with farming—without having a negative effect on the colony's economy. The Bishop of Québec, Henri-Marie Dubreil de Pontbriand, became aware of this problem in the course of his pastoral visits and issued a decree reassigning 18 of the mandatory feast days to Sundays, which reduced the number of days without work.

Feast Days
Pastoral letter from the Bishop of Pontbriand reassigning the celebration of a number of feast days to Sundays, November 24, 1744
FR CAOM COL F3 13 fol. 190-191vo