National days, ongoing national weeks and months, and global observances for September 15, 2026. Plus historical events and birthdays.
September 15, 2026 celebrates National IT Professionals Day, plus 9 more. Annually on the third Tuesday in September, National IT Professionals Day honors the venerable geeks of the world we all rely on to keep us connected.
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As one of America's favorites, National Double Cheeseburger Day on September 15 recognizes a food icon savored across the U.S. We are bringing you double the taste on this delicious food holiday.
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On September 15, National Cheese Toast Day savors the cheesy goodness of this classic dish.
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On September 15th, National Online Learning Day recognizes the advantages and vast potential of online learning. It also honors the accomplishments of online students everywhere.
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On September 15, National Linguine Day fills the dinner menu at home and restaurants across the country. If you're anything like us, you are already planning on finding the quickest and easiest way to celebrate this tasty food holiday.
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On September 15 each year, National Neonatal Nurses Day recognizes those who care for the most fragile patients as they take their first breaths. The celebration takes place in the middle of National Neonatal Intensive Care Awareness Month.
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National Tackle Kids Cancer Day on September 15 gives you a chance to be part of the cure for pediatric cancer research. Join other Tackle Kids Cancer supporters by volunteering to rally our community and raise the needed funds for pediatric cancer research.
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National Voter Registration Day usually falls on the fourth Tuesday of September as a day to urge citizens to register to vote. Every state varies on what that date is, so make sure you're registered to make your vote count!
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.
Longer-running observances that include this date.
National Construction Appreciation Week
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National Security Officer Appreciation Week
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National Rehabilitation Awareness Week
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National Indoor Plant Week
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National Farm Animals Awareness Week
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National Surgical Technologists Week
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National Farm Safety And Health Week
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National Eczema Week
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Self-care Awareness Month
Month
National Suicide Prevention Month
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National Recovery Month
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Hispanic Heritage Month
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National Mushroom Month
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National Potato Month
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Self-improvement Month
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National Preparedness Month
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National Library Card Sign-up Month
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National Chicken Month
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National Coupon Month
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Better Breakfast Month
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Showing the first 12 — See all months for September.
