Why is this day considered unlucky? Like many elements of folklore and superstition, it’s hard to trace; but the most accepted theory is that it stems from medieval contemplation of Christian elements. It’s pretty easy to see why Friday might be considered unlucky; it was the day of the week when Christ died, after all. The fear of the number 13 is likewise thought to stem from the death of Christ: that is, the Last Supper involved 13 people and took place on the 13th day of the Hebrew month of Nisan.
Of course, this correlation is contrary to Catholicism. In addition to the condemnation of superstition as “the deviation of religious feeling” (Catechism of the Catholic Church 2111), why would God condemn one day of the week or one number as being somehow better or worse than the others? Even Sundays are not inherently better than other days; they are simply used to mark particular religious practices.
Interested in why we are not superstitious? Check this out: https://medium.com/@CatholicTV/feeling-nervous-on-friday-the-13th-heres-why-catholics-aren-t-superstitious-684f379dc291
Superstition defined: a widely held but unjustified belief in supernatural causation leading to certain consequences of an action or event, or a practice based on such a belief.
