unknown
Friday the 13th: Where did the superstition of this day being related to bad luck originate?
Superstitions are irrational beliefs based on cause-and-effect relationships without any explanation. Usually, these are related to bad luck, so each one has been adapted or modified depending on the place or culture where it applies.

TL;DR
- Superstitions are irrational beliefs about cause and effect, often related to bad luck and varying by culture.
- Friday the 13th is a famous superstition, amplified by the 'Friday the 13th' film franchise.
- The fear of the number 13 may stem from Norse mythology, where Loki was the 13th god, and also from 14th-century writings describing Fridays as days of catastrophe.
- A 1907 story describes a Wall Street broker causing market crashes on Fridays the 13th.
- The 'The Thirteen Club' paradoxically fueled fear by attempting to defy superstitions on Fridays the 13th.
- Some individuals avoid activities and stay home on Friday the 13th due to these beliefs.