Spilling salt is considered unlucky due to historical beliefs and superstitions. In ancient times, salt was a valuable commodity, symbolizing wealth and purity. The act of spilling it was thought to invite misfortune or bad luck, leading to the practice of tossing a pinch of the spilled salt over one's left shoulder to ward off evil spirits. This ritual was believed to counteract the negativity associated with the spill.
Not that long ago, salt was expensive, and of course accidentally wasting something valuable would have been unlucky. Same went for mirrors.
No it is bad luck that is why you have to throw it over you left shoulder to hit the demon in the eyes.
left
Symbols change with each country and even in different parts of a country but here are some that I've heard of.LuckyTigersHorseshoes (opening toward the sky)RainbowsDolphinsLadybugsUnluckyHorseshoe (opening downward)Breaking mirrorsBlack catsMagpiesowls
Unlucky.
Black cats are considered unlucky.
No, however something like a cat who happens to be black IS considered unlucky by some people.
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the Left Shoulder
For many generations, black cats were considered unlucky. In some cultures, the numbers 7 or 13 are also unlucky.
To throw salt over your shoulder has the same meaning as to say: " Bless You " after somebody has sneezed to ward off the evil spirits. Why...? because when somebody spills a salt (salt used to be considered highly valued commodity thus to waste salt was seen almost like a blasphemy) he/she is vulnerable to devil's machinations. :-))) superstition.... or???? :-)))
Friday is not considered an unlucky day by people in Christian countries. Some superstitious people consider Friday the 13th an unlucky day.