Rheumatoid Arthritis Awareness Week is an annual campaign dedicated to raising awareness about rheumatoid arthritis (RA), a chronic autoimmune disease that causes inflammation, pain, and swelling in the joints. This week aims to educate the public about the challenges faced by those living with RA, promote early diagnosis and treatment, and support ongoing research to...
What is National Retinoid Week? Celebrated annually by skinbetter on the third week of September, National Retinoid Week focuses on educating on the demonstrated benefits of retinoids and showcasing innovations in formulations that aim to enhance efficacy and tolerability. This is a new holiday registered by skinbetter science and intended as a platform for the skincare industry celebrate the power...
Constitution Day, also known as Citizenship Day, is an annual observance in the United States that commemorates the signing of the U.S. Constitution on September 17, 1787. This day is dedicated to celebrating and reflecting on the significance of the Constitution as the foundation of the American government and the rights and freedoms it guarantees....
National Pet Bird Day takes place every year on 17 September, celebrating companion birds and the joy they bring to millions of households. Created in 2019 by the Bird Enjoyment and Advantage Koalition (BEAK), the day recognises the bond between people and their feathered companions while encouraging responsible, well-informed bird ownership. What is National Pet...
National Professional House Cleaners Day takes place every year on 17 September. The observance recognises the skill, effort, and professionalism of the people who clean homes for a living, and it asks the public to treat house cleaning as the legitimate trade it is rather than as menial labour. It is primarily marked in the...
Constitution Day, also known as Constitution and Citizenship Day, is observed in the United States on 17 September each year, marking the anniversary of the signing of the US Constitution in 1787. It is a federal observance that celebrates the foundational document of American democracy and honours those who have become United States citizens. The...
World Manta Day takes place every year on 17 September, raising awareness of manta and devil rays and the mounting threats they face in the world's oceans. Established by the Manta Trust, the day brings together conservationists, divers, scientists, and ocean lovers to celebrate these gentle giants and push for stronger protection. In 2026, World...
National Arielle K. Sterrett Day takes place every year on 17 September. It is a day of kindness created in memory of Arielle K. Sterrett, a teenager from Kennesaw, Georgia, and it encourages people to carry out random acts of kindness for both people and animals. The date was chosen because it was Arielle's birthday....
National Pawpaw Day is celebrated on the third Thursday of September each year, putting the spotlight on North America's largest native fruit. In 2026, it falls on Thursday, 17 September. The day was created to rescue the pawpaw from obscurity and connect people with a remarkable fruit that once played a central role in both...
National Cartonnage Day takes place on Friday, 18 September 2026, celebrating the craft of cartonnage, the art of making fabric-covered and paper-covered boxes by hand. The day encourages crafters of every skill level to pick up cardboard, fabric, glue, and imagination, and create something beautiful and useful. It was founded by Claudia Squio of ColorWay...
National Ceiling Fan Day falls on Friday, 18 September 2026. It is a light-hearted annual observance that celebrates the humble ceiling fan while encouraging people to think about energy use and the cost of cooling their homes. Created by the ceiling fan manufacturer Fanimation, the day champions fans as a simple, low-cost way to stay...
World Water Monitoring Day takes place every year on 18 September and encourages people everywhere to test the quality of the rivers, lakes and streams in their local area. The day promotes citizen science as a way to build public awareness of water resources and the threats they face. It was established in 2003 and...
Chile Independence Day, known in Chile as the Dieciocho, falls on Friday, 18 September 2026. The national holiday marks the anniversary of the First National Government Junta of 1810 and opens the wider Fiestas Patrias, a period of patriotic celebration recognised across the country and observed by Chilean communities around the world. The Story Behind...
National Cheeseburger Day takes place every year on 18 September, and in 2026 it falls on a Friday. The day celebrates one of the most beloved foods in American culture: the humble cheeseburger, a stack of grilled beef and melted cheese that has become a global favourite. It is a light-hearted food holiday marked by...
National Day of Civic Hacking takes place on Friday, 18 September 2026. It is a nationwide day of action that brings together software developers, designers, data analysts, community organisers, and everyday residents to use technology and creativity to tackle local problems and strengthen their communities. What is National Day of Civic Hacking? National Day of...
National Cat DNA Day takes place on Saturday, 19 September 2026. The day celebrates the science of feline genetics and encourages cat owners to learn more about their pet's breed mix, health risks and unique traits. It was created in 2020 by Basepaws, a feline genetics company that produced the first at-home comprehensive cat DNA...
National Sew a Jelly Roll Day is an annual celebration for quilters and sewists, dedicated to one of quilting's most popular precut bundles: the jelly roll. It falls on the third Saturday of September each year, which in 2026 means Saturday, 19 September. The day encourages makers of every skill level to open up a...
Love and Friendship Day, known in Spanish as Dia del Amor y la Amistad, is celebrated on the third Saturday of September, which in 2026 falls on Saturday, 19 September. It is a Latin American celebration of both romantic love and friendship, most widely observed in Colombia, where it functions as the national equivalent of...
Big Whopper Liar Day is a light-hearted celebration of the tall tale, observed each year on the third Saturday of September. In 2026 it falls on Saturday, 19 September. The day invites people to spin the most outrageous, far-fetched and gloriously unbelievable stories they can dream up, all in the name of fun. It is...
International Eat An Apple Day falls on Saturday, 19 September 2026, landing on the third Saturday of September each year. The day celebrates one of the world's most familiar fruits and encourages people everywhere to bite into an apple, whether straight from the orchard, baked into a pie, or pressed into juice. It arrives just...
International Red Panda Day is an annual conservation awareness day held on the third Saturday of September, falling on Saturday, 19 September 2026. Organised by the Red Panda Network, the day raises awareness of the red panda, an endangered species native to the eastern Himalayas and southwestern China, and rallies support for the work being...