September 17, 2026, is the 260th day of the year, with 105 days remaining, and it falls on a Thursday, still within the thirty-eighth week of the year.
With 15 national and international days on the calendar, September 17 centers on citizenship and civic life. Constitution Day and Citizenship Day marks the anniversary of the signing of the US Constitution in 1787, growing out of I Am an American Day in the 1940s before Congress formally renamed it in 2004.
International Country Music Day, established in 2003, honors Hank Williams, born on this date in 1923. National Monte Cristo Day, established in 2015 by restaurant chain Bennigan’s, celebrates the fried sandwich that evolved from France’s croque-monsieur. And World Patient Safety Day, proclaimed in 2019 by the World Health Organization, promotes global action to reduce avoidable harm in healthcare.
National Days on September 17
All national & international days celebrated today
15 celebrations on this day Day 260 of 365 · 105 days left · week 38 · Virgo season · 🌒 waxing crescentConstitution Day and Citizenship Day
Marks the anniversary of the signing of the US Constitution in 1787, growing out of “I Am an American Day” in the 1940s before Congress formally renamed it in 2004.
International Country Music Day
Established in 2003, honoring Hank Williams, one of the genre’s most iconic figures, who was born on this date in 1923.
National Monte Cristo Day
Established in 2015 by restaurant chain Bennigan’s, honoring the fried ham, turkey, and cheese sandwich that evolved from France’s croque-monsieur.
World Patient Safety Day
Proclaimed in 2019 by the World Health Organization, promoting global action to reduce avoidable harm in healthcare, with a new theme highlighted each year.
Here’s every observance celebrated on September 17, 2026.
National & International Days on September 17
Here’s a closer look at the 15 national and international days celebrated on September 17.
Australian Citizenship Day
Australian Citizenship Day 🇦🇺 was first celebrated in 2001. It was established following a recommendation from the Australian Citizenship Council. The date commemorates 1973, when the Nationality and Citizenship Act 1948 was renamed the Australian Citizenship Act 1948, the first time “Australian citizen” appeared in legislation. The day celebrates the rights and responsibilities of citizenship and honors the diversity of modern Australia through ceremonies, school programs, and community events.
Constitution Day and Citizenship Day
Constitution Day and Citizenship Day (U.S.) marks the anniversary of the signing of the U.S. Constitution in 1787 and honors both native-born and naturalized citizens. It grew out of “I Am an American Day,” introduced in the 1940s, and was formally combined with Constitution Day in 1952. Congress renamed it in 2004, requiring federally funded schools to hold educational programs about the Constitution. The observance reflects both the nation’s founding principles and the continuing importance of citizenship.
International Country Music Day
International Country Music Day celebrates the global influence of country music while honoring the legacy of Hank Williams, one of the genre’s most iconic figures, born on this date in 1923. Established in 2003, the observance highlights how country music, rooted in American folk traditions of the South, has grown into a worldwide cultural force, blending storytelling, emotional expression, and musical innovation. From early Appalachian ballads and Western swing to modern country-pop and international festivals, the genre resonates with themes of love, hardship, and resilience that cross borders and generations.
🎶 Related observance: National Country Music Day on July 4.
International Day of Listening
International Day of Listening* (Third Thursday in September) was established in 2016 by the International Listening Association (ILA) to highlight the critical importance of listening in personal relationships, education, workplaces, and communities. The ILA itself was founded in 1979 by Dr. Ralph G. Nichols, a professor at the University of Minnesota and widely regarded as “The Father of Listening.” This day not only encourages people to talk less and listen more but also promotes listening as a skill that fosters empathy, understanding, and conflict resolution in a noisy, fast-paced world.
👂 The “International Day of Listening” should not be confused with other listening-focused observances. World Listening Day (July 18), created in 2010 by the World Listening Project, honors composer R. Murray Schafer and raises awareness of soundscapes and acoustic ecology. National Day of Listening in the U.S., founded in 2008 by StoryCorps, takes place on the day after Thanksgiving (Black Friday) and encourages families to record and share personal stories as an alternative to shopping.
National Apple Dumpling Day
National Apple Dumpling Day celebrates one of America’s most comforting desserts: the apple dumpling. The dish dates back to colonial times, when settlers adapted European pastry traditions using the abundant apples of North America. In particular, the Pennsylvania Dutch community embraced apple dumplings, baking spiced, cored apples wrapped in dough and served with cream or syrup. Today, the dish continues to symbolize home baking, fall traditions, and the enduring role of apples in American culture.
National Monte Cristo Day
National Monte Cristo Day was established in 2015 by the U.S. restaurant chain Bennigan’s. It pays tribute to the Monte Cristo, a fried sandwich filled with ham, turkey, and cheese, often served with powdered sugar and jam. The dish evolved from France’s croque-monsieur and rose to popularity in the mid-20th century, especially in California diners and Disneyland’s Blue Bayou restaurant.
National Pawpaw Day
National Pawpaw Day* (Third Thursday in September) shines a spotlight on America’s largest native fruit, once a staple in the diets of Indigenous peoples and early settlers. The pawpaw’s custard-like flavor, often described as a blend of banana and mango, was celebrated by figures like George Washington and the Lewis and Clark expedition. Kentucky State University, home to the National Clonal Germplasm Repository for Asimina species, established the day in 2019 to promote research, cultivation, and renewed appreciation of this overlooked fruit, sometimes called the “poor man’s banana.”
National Pet Bird Day
National Pet Bird Day was created in 2019 by the Bird Enjoyment & Advantage Koalition (BEAK). It recognizes the joy and companionship that pet birds bring while promoting responsible ownership. It highlights the intelligence, beauty, and personality of parrots, finches, canaries, and other birds, while reminding owners of the specialized diets, enrichment, and care these animals require. The day fosters appreciation for birds as companions and raises awareness about their long lifespans and unique needs.
National Pet Carbon Monoxide (CO) Safety Day
National Pet Carbon Monoxide (CO) Safety Day was established in 2020 by Kidde to raise awareness about the dangers of carbon monoxide poisoning for pets as well as humans. Known as the “silent killer,” CO is odorless and colorless, produced by faulty heating systems, appliances, or blocked vents. The day encourages pet owners to install and test alarms, learn the symptoms of poisoning in animals, and ensure homes are properly ventilated. It reminds us that pet safety is inseparable from family safety.
National Professional House Cleaners Day
National Professional House Cleaners Day recognizes the essential contributions of professional house cleaners, whose work ensures healthier, safer, and more comfortable living environments. Founded in 2019 by the American House Cleaners Association (AHCA), the observance highlights house cleaning as a skilled trade that requires knowledge of sanitation, organization, and time management. By honoring professional cleaners, the day brings attention to their role in protecting public health, supporting busy households, and maintaining standards of cleanliness that benefit individuals, families, and communities.
National Table Shuffleboard Day
National Table Shuffleboard Day was created in 2017 by Zieglerworld, a shuffleboard manufacturer This day celebrates a game with roots in 15th-century England. Known historically as “shove-groat,” shuffleboard evolved into a pastime enjoyed in pubs, community centers, and family homes.
Time’s Up Day
Time’s Up Day was created by holiday creators Thomas and Ruth Roy of Wellcat Holidays to encourage reconciliation and forgiveness. It reminds us that life is too short to carry grudges and that apologies and kindness can repair broken relationships. The observance reflects the power of second chances, urging people to take initiative in resolving conflicts.
World Manta Day
World Manta Day was established in 2020 by conservation groups such as the Manta Trust. It highlights the importance of manta and mobula rays to marine ecosystems. These graceful filter-feeders are threatened by overfishing, climate change, and habitat degradation. World Manta Day educates the public about their ecological role and calls for global action to protect them through sustainable fishing, marine protected areas, and community engagement.
World Patient Safety Day
World Patient Safety Day was proclaimed in 2019 by the World Health Organization (WHO). This annual UN-backed observance promotes global action to reduce avoidable harm in healthcare. It recognizes patient safety as a fundamental component of quality health systems. Each year carries a theme, such as safe maternal care or medication safety, encouraging hospitals, policymakers, and communities to work together to protect patients.
World Quantum Readiness Day
World Quantum Readiness Day* (Fourth Thursday in September) was established in 2024 by DigiCert, a leading provider of digital trust, to raise awareness about the cybersecurity challenges posed by quantum computing and the urgent need for post-quantum cryptography (PQC). The day highlights the threat of “Q-Day”—the point at which quantum computers could break current encryption methods—making today’s sensitive data vulnerable to “harvest now, decrypt later” attacks. The observance encourages organizations to adopt crypto-agility, explore quantum-safe solutions, and build strategies for securing digital infrastructure in the quantum era.
🤖 While World Quantum Day (April 14) promotes general public understanding of quantum science, World Quantum Readiness Day specifically focuses on the security risks and proactive measures needed to protect global information systems.
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National Days in September
