November 10, 2026 is day 314 of the year, with 51 days left, and it falls on a Tuesday in ISO week 46, with 1 moving date on the calendar.
With 13 national and international days on the calendar, the day covers everything from Area Code Day and the Marine Corps birthday to Sesame Street’s debut and UNESCO’s science day for peace. Here’s the story behind every celebration on November 10, from Area Code Day to World Top Up Day.
National Days on November 10
All national & international days celebrated today
13 celebrations on this day Day 314 of 365 · 51 days left · week 46 · Scorpio season · 🌒 waxing crescentNational Forget-Me-Not Day
Judge Robert S. Marx, a World War I veteran, created the day in 1921. He also founded the Disabled American Veterans, and the little blue flower became its symbol of remembrance.
National Vanilla Cupcake Day
A day for the classic vanilla cupcake. An American cookbook from 1796 already described a cake baked in small cups, an early ancestor of the treat.
Sesame Street Day
The show premiered on November 10, 1969, created by Joan Ganz Cooney and Lloyd Morrisett. New York City proclaimed the day in 2009 for the 40th anniversary.
USMC Day
The Marine Corps traces its birth to November 10, 1775, when the Continental Congress raised two battalions in Philadelphia. Maj. Gen. John A. Lejeune ordered the date observed in 1921.
National & International Days on November 10
Below is a list of all observances celebrated on November 10, each with a brief explanation.
Area Code Day
Area Code Day highlights how the simple three-digit system revolutionized telephone communication and laid the groundwork for today’s interconnected world. Introduced by AT&T and Bell Laboratories in 1947 as part of the North American Numbering Plan, it made direct long-distance dialing possible without operator assistance. The first call using an area code took place on November 10, 1951, when a connection was made from Englewood, New Jersey, to Alameda, California.
International Accounting Day
International Accounting Day recognizes the work of accountants and financial professionals around the world. The date marks the anniversary of Summa de Arithmetica, published in 1494 by Venetian mathematician Luca Bartolomeo de Pacioli, who is often called the Father of Accounting for describing the double-entry bookkeeping system still in use today. The first official celebration took place in 1972, organized by the San Diego chapter of the California Society of CPAs, and it has since grown into a global observance recognizing the vital role accountants play in maintaining financial transparency, integrity, and trust in every sector of society.
🧾 A similar observance, National Accounting Day is observed on May 19.
International Summer Camp T-Shirt Day
International Summer Camp T-Shirt Day / Camp T-Shirt Day* (Date Varies) began over a decade ago to bring the camp community together beyond the summer season. On this day, campers, counselors, and alumni wear their favorite camp shirts and share their stories online. The celebration keeps the memories of camp friendships, teamwork, and outdoor fun alive throughout the year.
National Civic Pride Day
National Civic Pride Day inspires people to take pride in where they live and do something good for their community. It was started in 2017 by Project FrontYard in Lafayette, Louisiana, to encourage everyone to keep their towns clean, beautiful, and welcoming. The day reminds us that small actions—like picking up litter, planting flowers, or helping a neighbor—can make a big difference when everyone takes part.
National Forget-Me-Not Day
National Forget-Me-Not Day supports disabled veterans and ensure their sacrifices are remembered. The day was created in 1921 by Judge Robert S. Marx, a World War I veteran who also founded the Disabled American Veterans (DAV). The small blue forget-me-not flower became the organization’s emblem, symbolizing remembrance and compassion. Volunteers sold these flowers to raise money for veterans whose needs exceeded available care after the war.
National Vanilla Cupcake Day
National Vanilla Cupcake Day celebrates the classic vanilla cupcake. The many other cupcake-related observances throughout the year show just how much people enjoy this delightful little cake in all its variations.
Sesame Street Day
Sesame Street Day commemorates the anniversary of the children’s television show that first aired in 1969. Created by Joan Ganz Cooney and Lloyd Morrisett of the Children’s Television Workshop (now Sesame Workshop), the program revolutionized early childhood education by combining entertainment and learning for preschoolers. Sesame Street helped children around the world learn numbers, letters, and social values such as kindness and inclusion. The day was first officially proclaimed in New York City in 2009 by Mayor Michael Bloomberg to celebrate the show’s 40th anniversary.
USMC Day
USMC Day (U.S. Marine Corps Birthday) / Death/Duty Day commemorates the establishment of the United States Marine Corps on November 10, 1775, when the Second Continental Congress created two battalions of Marines in Philadelphia. The date was officially declared the Corps’ birthday in 1921 by Major General John A. Lejeune, ensuring that Marines continue to celebrate their proud history and service each year.
World Immunization Day
World Immunization Day highlights the importance of vaccines in keeping people healthy and preventing the spread of dangerous diseases. Vaccination helps protect individuals and entire communities, saving millions of lives every year. The observance began around 2012 to remind the world that access to vaccines should be available to everyone, no matter where they live.
World Keratoconus Day
World Keratoconus Day raises awareness about keratoconus, a progressive eye condition that causes the cornea to thin and bulge into a cone shape, leading to blurred and distorted vision. Founded in 2016 by the National Keratoconus Foundation (NKCF), the day focuses on educating the public, supporting patients, and emphasizing the importance of early diagnosis and treatment options such as corneal cross-linking and specialized contact lenses.
World NET Cancer Day
World NET Cancer Day raises awareness about neuroendocrine tumors (NETs)—a rare and often misdiagnosed form of cancer. Because NET symptoms can mimic common conditions like asthma or irritable bowel syndrome, diagnosis is frequently delayed. The observance was founded in 2010 by the World NET Community Steering Committee and is now led by the International Neuroendocrine Cancer Alliance (INCA). Its “Think Zebras” message reminds doctors and patients to consider rare diseases when symptoms don’t fit typical patterns, promoting earlier detection and better outcomes.
World Science Day for Peace and Development
World Science Day for Peace and Development emphasizes the importance of science in building a more peaceful and sustainable world. Proclaimed by UNESCO in 2001 and first celebrated in 2002, the day encourages global dialogue about how science shapes society, promotes international cooperation, and reminds governments and citizens alike of the need to use scientific progress responsibly for the benefit of all.
World Top Up Day
World Top Up Day celebrates the kindness of people who send mobile credit to loved ones abroad. Founded in 2015 by MobileRecharge.com, the observance recognizes how immigrants and expatriates use mobile top-ups to stay connected with family and friends.
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National Days in November
