Albert Einstein has been the subject of or inspiration for many works of popular culture.
On Einstein's 72nd birthday on March 14, 1951, UPI photographer Arthur Sasse was trying to persuade him to smile for the camera, but having smiled for photographers many times that day, Einstein stuck out his tongue instead. This photograph became one of the most popular ever taken of Einstein, often used in merchandise depicting him in a lighthearted sense. Einstein enjoyed this photo and requested UPI to give him nine copies for personal use, one of which he signed for a reporter. On June 19, 2009, the original signed photograph was sold at auction for $74,324, a record for an Einstein picture.
Einstein is a favorite model for depictions of mad scientists and absent-minded professors; his expressive face and distinctive hairstyles have been widely copied and exaggerated. Time magazine's Frederic Golden wrote that Einstein was "a cartoonist's dream come true."
"Einstein" has become a word used to describe someone extremely intelligent; the name is also applied sarcastically to someone who states the obvious or displays a lack of intelligence or insight (", Einstein!").
In 1999, leading physicists voted Einstein the "greatest physicist ever".
His birthday, March 14, is also Pi Day, so called because 3/14 corresponds to 3.14, the first three digits of the number Pi. The town of Princeton, New Jersey, where Einstein lived for more than 20 years, celebrates March 14 every year as "Princeton Pi Day and Einstein Birthday Party."
The children's television show Little Einsteins and the educational toys and videos of the Baby Einstein series both use Einstein's name, though not his image.
Iranian cartoonist and humorist Javad Alizadeh publishes a column titled "4D Humor" in his Persian monthly Humor & Caricature, which features cartoons, caricatures and stories on Einstein-related topics. In 1991 he published in Persian "4D Humor", a comic book on Einstein's life and work, inspired mainly by the Theory of Relativity.