German printer Richard Sellmer revived Advent calendars after World War II

The first printed Advent calendars were from Germany in the early 1900s

Printed Advent calendars originated in early-20th-century Germany, where printer Gerhard Lang created the first commercially produced versions. Inspired by his mother’s homemade countdowns, Lang added small doors in the 1920s, establishing the format that spread worldwide.

The first chocolate Advent calendar appeared in 1958

Chocolate Advent calendars began in 1958, when German companies first paired the traditional countdown with small pieces of chocolate behind each door. The idea spread slowly at first, but eventually became one of the most popular Advent calendar formats worldwide.

Nazi Germany replaced Advent calendars with depictions of family life under Nazi rule

During World War II, the Nazi regime banned printed Advent calendars because of religious messaging. Officials instead produced state-approved versions featuring swastikas, tanks, and Nazi symbols.

Advent calendars have become a major seasonal driver for brands

Companies now treat Advent calendars as key holiday products, expanding production as demand surges across categories. Retail data shows beauty and self-care calendars consistently rank among the most popular, as some brands report selling out yearly, and retailers order months in advance.

A German town transforms its entire city hall into a massive Advent calendar

Gengenbach turns its 18th-century town hall into a 24-window Advent calendar attracting up to 220,000 visitors each December. Each night reveals new art, reviving winter tourism in the town.

See some of the weirdest Advent calendars you can buy

Modern Advent calendars span nearly every niche imaginable. Shoppers can now buy versions filled with cheese, dog treats, hot sauce, and even sexual-wellness products, reflecting how far the tradition has expanded beyond simple chocolate countdowns.

See how Advent traditions vary widely around the world

Advent is celebrated in distinct ways across countries—Chinese Christians hang colorful lanterns, Mexicans reenact Las Posadas processions, Germans light weekly wreath candles, and Hungarians attend dawn matins—reflecting how local cultures shape the season’s preparation.

Martin Luther is often cited as the first to decorate the Christmas tree—though the practice began decades earlier

Luther lore claims he may have been the first to link tree decorations to Jesus, as he used candles to symbolize the Nativity star. However, German bakers had adorned evergreens with apples and sweets as early as 1419 for Christmas Eve displays.

Dalí partnered with Hallmark to design surreal Christmas cards

Dalí pursued commercial work throughout his career. In 1948, Hallmark released a set of Christmas cards designed by the artist. A decade later, he created images for additional holidays, including Valentine's Day, Easter, and Mother's Day.

One man in Germany answers a large amount of Santa's mail

There are a few places in the world where much of Santa Claus's mail ends up, often because their name includes the jolly man's moniker. One of those places is Nikolausdorf, Germany, where Hubert Weddehage, a local government employee, has responded to Santa's mail for over 50 years.

‘Compound chocolate’ lacks cocoa butter, making Advent calendar candy taste different

One of the fun aspects of the contemporary Advent calendar, making them irresistible to children, are the numerous little chocolates often tucked inside little paper flaps, marking each day leading to Christmas. That chocolate tastes different because it’s likely made from inexpensive fats like palm kernel oil, not cocoa butter.

The unexpected origin story of the snow globe

In 1900, a Vienna tradesman named Erwin Perzy I was attempting to invent an inexpensive way to improve light amplification in hospital operating rooms. After experimenting with a glass globe filled with water, the idea for the snow globe struck. Industrious as well as inventive, Perzy eventually turned his idea into a successful business. Read the full article to learn how the invention grew to become recognized globally.

Rockwell helped define the American Christmas

Rockwell painted 30 Christmas covers for the Saturday Evening Post. Drawing on his love of Charles Dickens’ “A Christmas Carol,” Rockwell placed the holiday’s unofficial traditions in an American context, with images of eager children, snow-covered small towns, and warm family meals.

Explore Sears’ holiday Wish Book catalogs dating back to 1930

The Sears Wish Book was a holiday-themed version of its catalogs that helped people make Christmas gift wish lists and more from the 1930s until the early 2000s. See what they looked like with editions in this archive.

Mall Santas became a widespread tradition beginning in the 1900s

Santa Claus and commercialism are inextricable. In the early 1900s, department stores started putting “live” Santa Claus displays in their windows to help sell goods.

In its famous catalog, Sears sold $600 DIY house kits from 1908 through the 1940s, resulting in an estimated 100,000 'Sears and Roebuck homes.'

Easter symbols and where they actually come from

The secular Easter—bunnies, eggs, baskets, candy—is almost entirely a German import. The egg-laying hare called Osterhase arrived with Pennsylvania Dutch immigrants in the 1700s; children left out nests for it to fill, which eventually became baskets. The word "Easter" itself may trace to Eostre, an Anglo-Saxon goddess of spring, though scholars contest the holiday's pagan origins.

Conversation candy hearts were originally message-free medicinal lozenges

In 1847, a Boston pharmacist invented a machine that automated the production of his pharmacy's medicinal lozenges and then formed the New England Confectionery Company, which later became part of the company now known as NECCO. By the late 1800s, they were producing cookies with Valentine-themed messages and eventually brought the romantic messages to their smaller lozenges, which they later called Sweethearts.

The history and operation of SIGABA, the US counterpart of the Nazi Enigma machine

Developed by the US Army and US Navy, over 10,000 of these machines were deployed by the end of World War II to encrypt messages for the armed forces using three series of rotors. The device would continue to be used until the 1950s, while personal computers were shown to possess enough computing power to crack it by 2021.

Germany’s surprise offensive in December 1944 failed to break Allied lines

In a bold counterattack from December 16, 1944, to January 28, 1945, Hitler committed over 400,000 troops in a surprise “Bulge” through the Ardennes forest in France. Although initially successful in creating a 50‑mile incursion, Allied defense halted the advance. German forces suffered irrecoverable losses (~100,000), while Allied casualties totaled ~75,000, marking the offensive as the last major German gamble and a decisive step toward Nazi defeat.

Mid-century modern graphic designers, known for their bright colors and bold lines in advertising, also found success with children's books.

World War II helped convince food companies to produce more processed foods

Processed foods had existed since the 19th century, but they began infiltrating the mainstream during World War II, with foods designed to last on the battlefield for days. After the war, food companies saw great potential in the relatively cheap foods aimed at busy households. (Some readers may experience a paywall.)

German expressionism produced some of horror’s earliest classics

After World War I, German filmmakers turned from reality to the surreal, fusing experimental art with the nascent world of film. Some of the movement’s most notable films, like FW Murnau’s “Nosferatu: A Symphony of Horror” and Robert Wiene’s “The Cabinet of Dr. Caligari,” were intent on frightening their audiences.

How 'Star Wars' turned toys into collectibles

George Lucas licensed the "Star Wars" franchise to Kenner Products, which created small figurines that became wildly popular. By the 1977 Christmas season, they were facing a shortage and sold mail-in rainchecks, effectively allowing customers to purchase figures that weren't yet produced. The strategy worked, portraying the toys as valuable collectibles whose price would appreciate.

A mysterious man named Emmerich Juettner once produced thousands of counterfeit $1 bills

After his wife died in 1937, Juettner fell into financial trouble and soon began replicating $1 bills. These bills aren’t typically prime targets for counterfeiting given their low value.

Read Norman Rosenthal’s original 1984 paper describing SAD

The study helped formalize research and diagnosis of seasonal affective disorder, catalyzing the development of therapies (like bright light) and leading to broader adoption of effective treatments. It also helped connect the influence of light and seasons on biological mechanisms in the human body, spurring exploration of circadian rhythms.

The calendars of the 'Lord of the Rings'

JRR Tolkien's epic fantasy trilogy "The Lord of the Rings" is a seminal work in the history of literature partly due to its creator's obsessive focus on systematic detail—including the calendars used in the world. Take a fantastic dive into the minutiae of Tolkien's creation by learning the different approaches to time organization in the Shire or Rivendell with this dense, comprehensive resource based on Tolkien's appendices.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

In 1945, Surrealist artist Salvador Dalí and legendary animator Walt Disney began collaborating on a short film that was not completed until 2003, years after both men had died.

The history of many kitchen appliances involves unexpected discoveries and applications, including wartime radar turned hamster defroster and replacing an 'ice king' with heat-stealing boxes.

Up to a million Girl Scouts sell about 200 million cookie boxes every spring, generating $800 million, largely because refusing a child is frowned upon

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

When a Paris department store hesitated to sell Estée Lauder's perfume, she 'accidentally' broke a bottle, causing the smell to spread throughout the store and shoppers to start asking to buy the scent.

El Niño, Spanish for 'the boy,' was named after Jesus Christ because the phenomenon resembled the weather changes observed around Christmastime.

Budweiser stores yeast derived from the original 1800s strain in a secret bunker, which only the Head of Yeast Management can access—not even the CEO

American dance legend Martha Graham, sometimes called 'the Picasso of dance,' refused to perform at the 1936 Olympics in Berlin and conceived the piece 'Chronicle' in response to the experience.

Frank Lloyd Wright's houses are historically hard to sell because they're old, subject to local landmark commissions, and often unfashionable

'Silent' fireworks have gained more interest in recent years as a quieter celebratory option.

For centuries, it was common to sleep in two shifts: a few hours at the beginning of the night, and a longer period beginning around midnight

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.

Sony set the standard for cylinder-shaped batteries when it repurposed manufacturing equipment used to make rolls of magnetic recording tape.

Visualize the path of every solar eclipse from 1900 to 2099 and see what each looks like when observed from different locations on Earth.

Elk Cloner, the first computer virus to spread in public, was written as a practical joke by Richard Skrenta, a Pittsburgh high school student.

Volcanic activity may have triggered the Black Death by spewing gases that led to crop failures in Europe, thus forcing the import of grain ships with plague-infested fleas.

How Amazon operates a 'flywheel' business model, a self-reinforcing cycle that drives continuous growth

The 1987 Nintendo video game 'Stadium Events' isn't known for being particularly fun, but its scarcity has made it a highly sought-after item that has sold for up to $35K at auction.

Meet the 56 signers of the Declaration of Independence—most of whom didn't put pen to paper until August 2, 1776—and see their original signatures.

Sunflowers have long been a symbol of nuclear disarmament because they can extract large amounts of radioactive cesium from soil.

Planarian flatworms are small, aquatic worms with exceptional regenerative capabilities. When cut, the worms can regenerate multiple bodies in a matter of weeks.

In 2026, Finland was named the world's happiest country for the ninth consecutive year based on its wealth, social safety network, and high life expectancy, among other factors.