Monday
September 15
25 holidays and observances fall on this day.
International Dot Day
International Dot Day on September 15 celebrates creativity, courage, and collaboration inspired by Peter H. Reynolds' book The Dot. Join millions
International Day of Democracy
International Day of Democracy on September 15 promotes democratic principles worldwide. Learn its history, importance, and how to celebrate.
World Afro Day
World Afro Day on September 15 celebrates the beauty and diversity of Afro hair, fights discrimination, and promotes pride in Black identity and culture.
National Double Cheeseburger Day
National Double Cheeseburger Day is inviting everyone to enjoy—and share—the irresistible charm of a double cheeseburger.
National Online Learning Day
National Online Learning Day is observed on September 15 each year, celebrating the flexibility, access, and community of learning online.
National Pregnancy and Infant Loss Remembrance Day
National Pregnancy and Infant Loss Remembrance Day honors babies lost through miscarriage, stillbirth, or infant death, raises awareness of pregnancy and infant loss grief, and encourages remembrance, support, and healing.
National Voter Registration Day
National Voter Registration Day on September 15 encourages all eligible Americans to register to vote. Find out how to participate in this civic
National Google.com Day
National Google.com Day on September 15 celebrates the founding of Google. Learn about its history, importance, and how to celebrate this tech milestone.
Make a Hat Day
Make a Hat Day is celebrated on September 15. Learn how to craft your own hat from simple materials and join a fun tradition that sparks creativity.
National Cheese Toast Day
National Cheese Toast Day on September 15 celebrates the simple joy of melted cheese on toast. Learn its history, importance, and fun ways to celebrate.
Greenpeace Day
Greenpeace Day on September 15 celebrates environmental activism and the work of Greenpeace. Learn about its history, importance, and how to take action.
Get Ready Day
Get Ready Day on September 15 encourages Americans to prepare for emergencies and natural disasters. Learn how to build a kit, make a plan, and stay safe.
National Custom Framing Day
National Custom Framing Day on September 15 celebrates the art of custom framing. Learn its history, significance, and creative ways to join the
National Africa Civility Day
National Africa Civility Day on September 15 celebrates African values of respect, tolerance, and understanding. Learn how to honor this day of peace and
National Linguine Day
National Linguine Day on September 15 celebrates the flat Italian pasta. Learn its history, importance, and fun ways to enjoy linguine.
Felt Hat Day
Celebrate Felt Hat Day on September 15 by wearing a stylish felt hat and honoring the craftsmanship of this timeless accessory. Discover its history.
National Creme de Menthe Day
Learn how to celebrate National Creme de Menthe Day on September 15 with cocktail recipes, dessert ideas, and fun ways to enjoy this minty liqueur.
National Tackle Kids Cancer Day
National Tackle Kids Cancer Day on September 15 raises awareness and funds for pediatric cancer research. Learn how to support children fighting cancer.
Butterscotch Cinnamon Pie Day
Butterscotch Cinnamon Pie Day on September 15 celebrates the delicious pairing of butterscotch and cinnamon in a unique pie. Learn its history and how to
Shout of Dolores
Shout of Dolores on September 15 marks the eve of Mexico's Independence Day, commemorating Miguel Hidalgo's cry for freedom in 1810.
Costa Rica Independence Day
Costa Rica Independence Day on September 15 commemorates independence from Spain. Celebrations include parades, torch run, and traditional food.
Honduras Independence Day
Honduras Independence Day on September 15 marks the nation's 1821 independence from Spain with parades, flag displays, and cultural celebrations.
Respect for the Aged Day
Respect for the Aged Day in Japan falls on the third Monday of September. Learn its history, why it matters, and how to celebrate elders.
Guatemala Independence Day
Guatemala Independence Day on September 15 celebrates freedom from Spanish rule with parades, cultural events, and national pride across the country.
El Salvador Independence Day
El Salvador Independence Day on September 15 marks freedom from Spain. Learn about its history, importance, and how to celebrate this patriotic holiday.
Coming up next
International Day for the Preservation of the Ozone Layer
Learn about the International Day for the Preservation of the Ozone Layer on September 16. Discover its history, importance, and how to celebrate
National Guacamole Day
National Guacamole Day is honoring the Aztec-born avocado dip with easy, shareable ways to enjoy it at home or with friends.
Working Parents Day
Working Parents Day is celebrating the dedication of parents who balance work and family and encouraging simple, practical ways to support them.
National IT Professionals Day
National IT Professionals Day honors the hard work of IT pros on the third Tuesday of September. Learn history, importance, and ways to celebrate.
Mayflower Day
Mayflower Day on September 16 honors the 1620 voyage of the Pilgrims. Learn about its history, significance, and ways to celebrate this day.
Collect Rocks Day
Collect Rocks Day on September 16 celebrates the hobby of rock collecting. Learn about its history, importance, and fun ways to participate.
National Trail of Tears Commemoration Day
National Trail of Tears Commemoration Day on September 16 honors Native Americans who suffered during the forced relocations. Learn history and how to
National Play-Doh Day
Celebrate National Play-Doh Day on September 16 with fun sculpting activities, DIY play dough recipes, and creative family time. Learn its history!
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