April 26, 2026, is the 116th day of the year, with 249 days remaining, and it falls on a Sunday — the last Sunday of April — in the seventeenth week of the year.
With 20 national and international days on the calendar, April 26 carries real emotional range as it marks the anniversary of the Chernobyl nuclear disaster in 1986, the date the WIPO Convention came into force in 1970, and the birth of Charles Richter in 1900 — alongside Alien Day, pretzels, Australian hugs, pinhole photography, and a day dedicated to the name that means love.
National Days on April 26
All national & international days celebrated today
20 celebrations on this dayInternational Chernobyl Disaster Remembrance Day
On April 26, 1986, Reactor No. 4 at the Chernobyl Nuclear Power Plant in Soviet Ukraine exploded — triggering the worst nuclear accident in history. The UN designated this day in 2016 to honour the victims, the first responders, and the communities still living with the consequences.
Alien Day
A tribute to the Alien film franchise — and specifically to LV-426, the fictional moon in the 1979 Ridley Scott film where the crew of the Nostromo made their fateful landing. The date 4/26 references LV-426 directly. First celebrated by fans in 2015, Fox officially embraced it in 2016.
World Intellectual Property Day
Established by WIPO on the anniversary of the WIPO Convention coming into force in 1970, this day promotes understanding of how patents, copyright, trademarks, and designs stimulate innovation and creativity — and explores how intellectual property shapes the culture and economy around us.
National Pretzel Day
A celebration of one of the world’s oldest snacks — a twisted bread with a history stretching back to early medieval European monasteries, where monks are said to have shaped leftover dough into a form resembling arms folded in prayer. Today pretzels come soft or hard, salted or sweet, plain or filled.
Here’s every observance celebrated on April 26, 2026.
National and International Days on April 26
Whether you’re watching the Alien films, eating a soft pretzel, decluttering a drawer, reaching out to an Australian friend, capturing light through a pinhole, or pausing to remember Chernobyl, here’s the story behind each of these April 26 celebrations.
Alien Day
Alien Day is an annual fan celebration of the Alien film franchise. The date choice comes from LV-426, the moon where the aliens are discovered in the films, making 4/26 a natural fit. It was founded in 2015 by Alaric Hahn, a fan from Brooklyn, New York, before 20th Century Fox officially adopted and expanded the event in 2016.
👽 Alien Day is now an annual observance among sci-fi fans and collectors, joining similar film-inspired days like Star Wars Day on May 4 and Doctor Who Day on November 23.
Deaf Parents Day
Deaf Parents Day* (Last Sunday in April) was founded by Trudy Schafer in 1994 to give hearing children of deaf parents, known as CODAs (Children of Deaf Adults), a day to celebrate and honor their families. It was officially established in 1996 by CODA International and was originally called Mother Father Deaf Day, before being simplified to Deaf Parents Day in 2021. The observance raises awareness of the experience of growing up across both deaf and hearing cultures, and challenges stereotypes about the abilities of deaf parents.
Eeyore’s Birthday
Eeyore’s Birthday started in 1963 as a student celebration at the University of Texas, honoring the gloomy donkey character from Winnie the Pooh. Now held on the last Saturday of April in Austin’s Pease Park, the event has grown into a full-day festival with costumes, drum circles, food, and live entertainment. It’s a playful expression of community and counter-culture, with proceeds supporting local charities.
🐻 A similar day, National Winnie the Pooh Day, is celebrated on January 18.
Get Organized Day
Get Organized Day emphasizes the benefits of tidying up and decluttering physical and digital spaces. Organizing your workspace or home can improve mental clarity, reduce stress, and increase productivity. While the origins of the day are unclear, it aligns with the goals of other observances like National Clean Out Your Refrigerator Day and National Simplify Your Life Week.
Hug an Australian Day
Hug an Australian Day was founded by Thomas and Ruth Roy as a fun occasion to show appreciation for the Australians in our lives. Whether you know someone from Down Under or simply want to celebrate Australian culture, the day encourages people worldwide to connect through warmth and kindness.
National ‘Ai’ Day
National ‘Ai’ Day invites reflection on the meaning and use of the word “Ai,” which translates to love or affection in both Chinese and Japanese. Celebrated on April 26, it recognizes the cultural significance of this word across languages and its frequent use as a name, especially in Japan.
National Dissertation Day
National Dissertation Day was founded in 2018 by Dr. Russell Strickland, CEO of Dissertation Done. The day supports and encourages doctoral candidates who are struggling with their dissertations, while also raising awareness of the challenges they face. It serves as an annual reminder for students to eliminate procrastination, maintain focus, and complete their dissertations.
National Garage Day
National Garage Day was founded in 2020 by Garage Condos, LLC to encourage people to see their garage as more than just a storage or parking space. The day promotes creativity and productivity by motivating people to organize and make the most of their garage.
🚗 It’s conceptually close to National Garage Sale Day in August.
National Help A Horse Day
National Help A Horse Day was created by the ASPCA to raise awareness about the neglect and abuse that horses face across the United States. The day encourages people to support horse rescue organizations, consider adopting a horse in need, or donate to equine welfare causes.
National Kids and Pets Day
National Kids and Pets Day was established in 2005 by Colleen Paige, a celebrity pet and family lifestyle expert, to celebrate the special bond between children and animals while raising awareness about pets in shelters that need homes. The day also highlights the importance of safety and responsible pet ownership, encouraging parents to choose the right pet for their child and to supervise interactions between kids and animals.
National No Makeup Day
National No Makeup Day encourages people to go bare-faced for the day as a way to embrace their natural appearance and challenge conventional beauty standards. The day began as a grassroots movement and became more structured in 2011, with April 26th set as the official date. No specific founder has been identified, as it grew organically through social media.
National Pet Parents Day
National Pet Parents Day* (Last Sunday in April) celebrates the bond between people and their animal companions, recognizing the love, care, and responsibility that comes with raising a pet. It was established by Veterinary Pet Insurance (now Nationwide Pet Insurance) in 2007 to honor those who treat their pets as cherished members of the family. The day encourages pet owners to spend quality time with their animals and reflect on the joy pets bring to everyday life.
National Pretzel Day
National Pretzel Day honors the pretzel, one of the world’s oldest snack foods with roots in European monasteries dating back to the 7th century. The day has no single credited founder, but it gained official recognition in the United States when Pennsylvania Governor Robert Casey proclaimed it in 2003, acknowledging Pennsylvania’s pretzel-making heritage.
National Richter Scale Day
National Richter Scale Day honors the birthday of Charles F. Richter, the American seismologist who developed the Richter magnitude scale in 1935. The scale gave scientists and the public a standardized way to measure and compare the size of earthquakes. The day recognizes Richter’s contribution to seismology and public safety awareness around seismic activity.
National South Dakota Day
National South Dakota Day, founded in 2017 by National Day Calendar, is observed on April 26 to honor South Dakota as the 40th state to join the Union. The day celebrates the state’s stunning landscapes and history, with the goal of drawing more visitors to this often-overlooked but beautiful part of America.
National Static Cling Day
National Static Cling Day brings attention to the everyday nuisance of static electricity, particularly in clothing. It’s an opportunity to learn the science behind why items cling, how to prevent it, and how materials carry electric charges. Similar science-focused days include National STEM Day in November and Static Electricity Day on January 9.
Remember Your First Kiss Day
Remember Your First Kiss Day invites people to look back on that special or perhaps awkward moment when they shared their first kiss, recalling who it was with and how it all unfolded. No founder has been identified for this observance, as it appears to have started in a grassroots way and gradually caught on with people who enjoy sharing their first kiss stories.
World Burlesque Day
World Burlesque Day was founded in 2020 by performer and mental health advocate Sapphira, also known as Priscilla Silcock, a London-based Australian-born burlesque artist, author, and mental health ambassador. She launched the international celebration to unite the global burlesque community, promote self-expression, and highlight the art form’s positive impact on mental health.
World Intellectual Property Day
World Intellectual Property Day raises awareness about how patents, copyrights, trademarks, and designs shape everyday life and drive innovation. It was established by the World Intellectual Property Organization (WIPO) under the leadership of its then Director General Kamil Idris, who launched it in 2000 to mark the date the WIPO Convention entered into force in 1970.
World Pinhole Photography Day
World Pinhole Photography Day* (Last Sunday in April) celebrates pinhole photography, a technique that captures images using a tiny hole in a light-tight container instead of a traditional lens. It was founded in 2001 by a group of pinhole photography enthusiasts through the website worldpinholeday.org, with the goal of promoting this stripped-back, lo-fi art form. Participants around the world take pinhole photos on the same day and share them in a global online gallery.
📸 A similar day, World Photography Day, is celebrated on August 19. This day marks the date in 1839 that the government in France purchased the patent for the Daguerreotype process.
