Why you shouldn't walk under a ladder — and other superstitions explained

Image: Raquel Pedrotti

Superstitions have shaped human behavior for centuries, often rooted in ancient beliefs, religious practices, or sheer coincidence. From knocking on wood to avoiding black cats, even today, these curious traditions persist across cultures. But where did they come from? Here are 12 common superstitions and the fascinating origins behind them.

Image: Alexey Demidov

This practice dates back to ancient pagan traditions, where trees were believed to house spirits. Knocking was a way to summon their protection or avoid tempting fate.

Over time, the superstition spread across cultures, and early Christians adapted it as a reference to the wood of the cross for divine protection. Today, people still "knock on wood" after making a hopeful statement to ward off bad luck.

Image: Savannah B.

Ancient Romans believed mirrors reflected the soul. Breaking one was thought to damage the soul, which would take seven years to renew.

This idea was reinforced in the Middle Ages, when mirrors became expensive. Breaking one was not only a spiritual concern but also a financial burden, and the superstition likely served as a warning to handle them with care.

Image: Waldemar

The fear of the number 13 stems from Norse and Christian traditions, with an unlucky 13th guest believed to bring misfortune. Friday was also linked to Jesus’ crucifixion.

The superstition intensified in the 20th century through pop culture references, leading to widespread fear. Many buildings and airlines even avoid labeling a 13th floor or row.

Image: Jilbert Ebrahimi

Ancient Egyptians saw ladders as sacred symbols, forming a triangle with the ground. Walking through one was believed to anger the gods.

During the Middle Ages, ladders were associated with gallows, creating a connection with death. The belief persists today, reinforced by the obvious danger of a ladder toppling.

Image: Tatiana Zanon

In medieval Europe, black cats were linked to witches, believed to be their familiars—or even witches in disguise—and crossing paths with one was thought to bring misfortune.

However, this wasn’t true everywhere. In ancient Egypt, black cats were especially revered, and today they are considered lucky in some cultures, particularly in Japan and Scotland.

Image: Trent Haaland

In Victorian England, umbrellas with spring mechanisms could accidentally injure people indoors, making this superstition more about a real hazard than a "bad omen."

A deeper origin may stem from ancient Egypt, where parasols were used to shield pharaohs from the sun. Opening one indoors was thought to offend the sun god Ra.

Image: Emmy Smith

Salt was a valuable commodity in ancient times, sometimes even used as currency. Spilling it was considered wasteful and unlucky.

Leonardo da Vinci’s The Last Supper depicts Judas spilling salt, reinforcing its association with betrayal and misfortune. As a countermeasure, tossing salt over the left shoulder was thought to blind evil spirits.

Image: Virgil Cayasa

The Romans believed water had sacred properties, and tossing a coin into a fountain was an offering to the gods for good fortune.

The Trevi Fountain in Rome helped popularize the tradition. Today, millions of coins are thrown into fountains worldwide, with many places donating the collected money to charity.

Image: Matt Benson

The horseshoe’s luck stems from iron’s historical association with warding off evil spirits and fairies. The shape also resembles a crescent moon, a symbol of protection.

In part, the association with the supernatural stemmed from the fact that blacksmiths were highly respected in medieval Europe, and their complex craft was seen by many as nearly magical.

Image: Dayne Topkin

This tradition likely originated with early Christians, who used finger gestures to invoke divine protection and ward off evil.

Over time, the practice became a general symbol of good luck, with people crossing their fingers for positive outcomes—or even to excuse small lies.

Image: Luis Villasmil

This rhyme originated in the 19th century as a playful warning to children, with no real historical basis.

However, cracks in sidewalks were sometimes linked to supernatural beliefs, with some cultures fearing they could allow evil spirits to escape from the underworld.

Image: mohammad hosein safaei

According to one theory, Pope Gregory I promoted saying "God bless you" during the bubonic plague to protect against disease, and the phrase stuck.

Another possible origin comes from ancient Rome, where sneezing was thought to temporarily expel the soul, making a blessing necessary for protection.

Calendar mysteries

Were you born on this rare date? Only 1 in 1,461 people were

Most of us think we know the calendar pretty well, and if we don’t, our phones are there to remind us of dates and events. But the way humans measure the passage of time hasn’t always been the same. From the origins of month names to the truth behind leap years, today we’re going to share 10 surprising facts you probably didn’t know about the calendar.

The probability of being born on February 29 is 1 in 1,461. Although birthdays on this date are rare, people born on it even have a name: leaplings. Leaplings officially get to celebrate their birthday on February 29 only once every four years, but what happens in the other years? While some people prefer not to jump to another month, March 1st is considered more astronomically accurate, as it comes directly after February 28.

The Earth’s orbit is elliptical, which means there are times when we are closer to the Sun and other times when we are farther away. In January, Earth is at its closest point to the Sun, known as "perihelion." You might wonder how we can be closer to the Sun during winter, but the seasons are caused by Earth’s tilt, not by our distance from the Sun. On the other hand, the month when we are farthest from the Sun is July, and this point in the orbit is called "aphelion."

Due to its particularly short duration, February is the only month that can lack a full moon. Lunar cycles are 29.5 days long, which means that, approximately every 19 years, February has all the lunar phases except the full moon. When this happens, both January and March have two full moons, with the second one being called a "Blue Moon"; and that's why, when we say "once in a blue moon," we're talking about something that happens very rarely. The next time this will happen will be in the year 2037.

Did you know that our calendar has a name? That’s right; most of the world uses the Gregorian calendar, named after Pope Gregory XIII, who introduced it in 1582 as a reform of the older system.

The main difference lies in how leap years are handled. The previous system, known as the Julian calendar, added a leap year every four years, assuming a year lasted exactly 365.25 days. However, a real solar year is slightly shorter. To fix this, the Gregorian calendar keeps leap years every four years with one exception: century years (like 1900) are not leap years unless they are divisible by 400 (such as 2000).

But before the Julian calendar, ancient Rome used an even older system with one key difference: it had only 10 months. This calendar began in March and ended in December, totaling just 304 days. What about the remaining days? They were considered a winter gap and simply weren’t counted. Around 700 BC, January and February were added to fill that gap, and these changes were later standardized under Julius Caesar’s reform in 45 BC, when he introduced the Julian calendar.

The names also come directly from life in ancient Rome, where months were named in honor of deities and important festivities. For example, March was named Martius after Mars, the god of war, because it marked the start of the military campaigning season. Aprilis, the Roman name for April, comes from the Latin verb aperire, meaning "to open," in reference to the arrival of spring. May was named Maius after Maia, the goddess of fertility and growth, and June was named Iunius in honor of Juno, the Roman goddess of marriage.

What about the rest of the months? From July through December, they were originally named after their position in the year. Since March was considered the first month, July was called Quintilis ("the fifth"), August was Sextilis ("the sixth"), September comes from septem, meaning "seven" in Latin, October from octo ("eight"), November from novem ("nine"), and December from decem ("ten").

Most of these names remained similar, with two exceptions: Quintilis was renamed Iulius to honor Julius Caesar after his death, and Sextilis became Augustus, in honor of Augustus Caesar, the first Roman emperor.

The days of the week are no exception to Roman tradition. Sunday was named dies Solis ("day of the Sun"), Monday was dies Lunae ("day of the Moon"), Tuesday was called dies Martis (day of Mars), Wednesday dies Mercurii (day of Mercury), Thursday dies Iovis (day of Jupiter), Friday dies Veneris (day of Venus), and finally, Saturday was dies Saturni (day of Saturn).

As you may have noticed, only Saturday retained its Roman root, while Sunday and Monday kept their meaning but were translated. What happened to the rest? They were influenced by Norse mythology, resulting in Tuesday being named for Tyr, a Norse god of war; Wednesday after Woden (Odin), the Norse interpretation of Mercury; Thursday from Thor, the god of thunder, replacing Jupiter; and Friday from Freya, a Norse goddess linked to the Roman Venus.

In the United States, Sunday is considered the start of the week. This tradition has religious and cultural roots, and it’s shared by many parts of the world, but not all of them. In fact, several other English-speaking countries do it differently: places like England, Australia, and parts of Canada consider Monday the first day of the week, with Sunday closing it out.