September 10 National Days

September 10 is the 253rd day of the year (254th in leap years), leaving 112 days until the year’s end.

National Days on September 10th — September 10 National Days

The date highlights themes of mental health, innovation, wellness, and culture. From raising awareness about suicide prevention and noise pollution to celebrating creative collaboration, frozen food history, and the world’s oldest demarcated wine region, September 10 balances serious advocacy with lighter cultural observances.

Here’s a closer look at the 7 national and international days celebrated on September 10.

National and International Days on September 10

National Anti-Junk Light Day was founded in 2018 by TrueDark to draw attention to the harmful effects of artificial light on health and the environment. Often called “junk light,” the glow from electronic screens, LED bulbs, and other artificial sources can disrupt circadian rhythms, contribute to sleep problems, strain the eyes, and increase light pollution. The day encourages people to make mindful choices—like reducing screen time before bed, using blue-light filters, and embracing natural daylight—to protect both personal well-being and the planet.

National Port Wine Day commemorates the creation of the Douro Demarcated Region in Portugal in 1756—the world’s first officially defined and regulated wine region. Established by the Marquis of Pombal, this historic step safeguarded the quality and authenticity of Port wine, ensuring its reputation as one of the world’s most distinctive fortified wines. The observance was launched in 2014 by the Port and Douro Wines Institute to honor this legacy, promote cultural heritage, and encourage appreciation of Port in all its styles—from ruby and tawny to vintage and white.

National Wine Day & Other Wine Holidays in 2025

National Quiet Day* (Second Wednesday in September) began in 2016 as part of a wellness campaign by Whirlpool to promote its quiet appliance technology. While rooted in marketing, the observance has a broader purpose: to encourage awareness of noise pollution and the importance of silence for mental health. Noise overload is linked to stress, anxiety, and sleep disruption, and National Quiet Day serves as a reminder to pause, embrace calm, and create peaceful spaces at home, at work, and in public life.

National Swap Ideas Day highlights the power of collaboration and exchanging perspectives. Founded by holiday creator Robert Birch, it encourages people to share thoughts, solutions, and innovations in order to spark creativity and problem-solving. The observance reminds us that breakthroughs often emerge when diverse viewpoints come together—whether in classrooms, workplaces, or casual conversations. By opening ourselves to others’ ideas, we not only expand our own thinking but also strengthen community bonds and foster collective progress.

National TV Dinner Day celebrates the 1953 debut of the Swanson TV Dinner, a frozen meal packaged in an aluminum tray designed to be eaten in front of the television. The first offering was a Thanksgiving-style meal of turkey, peas, cornbread dressing, and sweet potatoes. This invention transformed the frozen food industry, catering to the growing television culture of mid-20th-century America. By making convenient, ready-to-heat meals accessible to households, it reflected broader cultural shifts in family life, consumer habits, and entertainment.

National TV Dinner Day

World Suicide Prevention Day (WSPD) was established in 2003 through collaboration between the International Association for Suicide Prevention (IASP) and the World Health Organization (WHO). Observed globally on September 10 each year, it unites communities, governments, and organizations with the message that suicide is preventable. The day highlights the importance of awareness, education, and support, while honoring those lost to suicide and offering hope to those who struggle. With nearly 800,000 lives lost to suicide each year worldwide, WSPD serves as both a call to action and a gesture of solidarity, aiming to reduce stigma and strengthen prevention strategies.

World Quantum Readiness Day* (dates change annually but some day 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.