International observance days, weeks, and months for September 15, 2026. Plus historical events and birthdays.
September 15, 2026 celebrates International Dot Day, plus 4 more. International Dot Day on September 15th gets your creative juices flowing. Established to celebrate creativity, courage, and collaboration, the celebration is easily one of the most fun days of the year!
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On September 15th, World Afro Day celebrates the natural hairstyle known as the afro, as well as the culture and identity of those who choose to wear an Afro. This day of change also educates others about the natural hairstyles of blacks and mixed-race people.
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The United Nations has marked September 15 as the International Day of Democracy. On this day the UN urges all governments to promote and uphold the principles of democracy.
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Greenpeace Day is observed on September 15 highlights activism in the name of the environment.
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World Lymphoma Awareness Day on September 15th is dedicated to informing the public about cancers of the lymphatic system.
Read the full story →People born on September 15
Author of novel The Last of the Mohicans.
The first Black professor at Harvard who also invented an early version of the golf tee.
The first African American to earn a Ph.D. from from any American university in America. He graduated from Yale University in 1876 with a Ph.D. in physics.
The 27th President of the U.S., serving from 1909 to 1913. He was also the 10th Chief Justice of the United States from 1921 to 1930.
Songwriter who wrote Here Comes Peter Cottontail and Frosty the Snowman.
Events that occurred on September 15 throughout history
The Department of Foreign Affairs is renamed the Department of State after domestic duties were assigned to the agency.
B.C. Forbes and Walter Drey found Forbes Magazine. Originally called Forbes: Devoted to Doers and Doings, the magazine provides articles on finance, industry, investing, and marketing.
Nazi Germany adopts a new national flag bearing the swastika.
Nazi Germany announces two new laws related to race and the rights of Jews. Known as the Nuremberg Race Laws, the laws stripped Jewish people of their political rights and made them state subjects instead of citizens. The laws also stated only people with "German or related blood" could be citizens.
Marilyn Monroe's iconic skirt scene is shot during filming for The Seven Year Itch.