April 24, 2026, is the 114th day of the year, with 251 days remaining, and it falls on a Friday — the last Friday in April — in the seventeenth week of the year.
With 18 national and international days on the calendar, April 24 carries unusual emotional weight: it is the date of the Armenian Genocide’s beginning in 1915, the Rana Plaza factory collapse in 2013, and the first Arbor Day in 1872 — a Friday that holds remembrance, accountability, and hope side by side with pigs-in-a-blanket, hairballs, and New Kids on the Block.
National Days on April 24
All national & international days celebrated today
18 celebrations on this dayArmenian Genocide Remembrance Day
Observed each April 24 to mark the beginning of the systematic deportation and massacre of Armenians by the Ottoman Empire in 1915 — a genocide that killed an estimated 1.5 million people. The day is one of solemn remembrance, recognition, and a call to never forget.
Fashion Revolution Day
Observed on the anniversary of the 2013 Rana Plaza factory collapse in Bangladesh, which killed 1,133 garment workers. Fashion Revolution asks consumers to demand transparency from clothing brands: “Who made my clothes?” — pushing the industry toward ethical and sustainable practice.
National Arbor Day
The last Friday of April, Arbor Day has been inspiring Americans to plant trees since 1872, when Julius Sterling Morton proposed a tree-planting holiday in Nebraska — a treeless prairie state. On the first Arbor Day, an estimated one million trees were planted. Today the tradition continues in every state.
Firefly Day
A tribute to Joss Whedon’s beloved space-western TV series, cancelled after just one season in 2002 but sustained by a fiercely devoted fanbase — the Browncoats — for over two decades. Firefly Day is a celebration of great storytelling, of fan love outlasting corporate decisions, and of the ‘verse.
Here’s every observance celebrated on April 24, 2026.
National & International Days on April 24
Whether you’re planting a tree for Arbor Day, asking a brand who made your clothes, remembering the victims of genocide, helping an animal in need, screaming into the void, or finally adding something bold to your bucket list, here’s the story behind each of these April 24 celebrations.
Armenian Genocide Remembrance Day
Armenian Genocide Remembrance Day honors the memory of the approximately 1.5 million Armenians who were killed by the Ottoman Empire between 1915 and 1923. It marks the date in 1915 when Ottoman authorities arrested and executed hundreds of Armenian community leaders in Constantinople, an act that triggered a systematic campaign of mass killings and forced deportations.
The day serves as a time for people to reflect on one of the first genocides of the 20th century, ensure its victims are not forgotten, and reaffirm the importance of preventing such atrocities from happening again.
Fashion Revolution Day
Fashion Revolution Day honors the memory of the 1,133 garment workers who lost their lives in the 2013 Rana Plaza factory collapse in Bangladesh. The disaster exposed the dangerous and exploitative conditions hidden behind the global fashion industry.
Observed annually on April 24, it serves as a global call for transparency and ethics in the fashion industry. The Fashion Revolution movement urges consumers to ask clothing brands, “Who made my clothes?” in hopes of holding them accountable for the safety and rights of their workers. The campaign has since become a major force in advocating sustainable fashion and humane labor practices.
It has since grown into a week-long global campaign called Fashion Revolution Week, calling for a fairer, safer, and more sustainable fashion industry.
Firefly Day
Firefly Day is a fan celebration of the short-lived science fiction TV series Firefly, created by Joss Whedon. The show aired briefly on Fox in 2002 before being cancelled after just one season, despite a devoted following. The day is a chance for fans, known as Browncoats, to rewatch the series, introduce it to new viewers, and keep enthusiasm alive for a show they feel ended far too soon.
✨ A similar observance, dedicated to actual fireflies is World Firefly Day that takes place on first weekend of July.
Help Animals Day
Help Animals Day was launched in 2022 by One Voice for Animals UK to raise awareness about the needs of animals and encouraging people to take action on their behalf. It serves as a reminder that animals, whether wild or domesticated, depend on human care and responsibility for their wellbeing.
The day invites people to get involved in simple but meaningful ways, such as volunteering at a local shelter, donating to animal welfare organizations, adopting a pet, or simply learning more about how to protect animals in their community and in the wild.
International Day of Multilateralism and Diplomacy for Peace
International Day of Multilateralism and Diplomacy for Peace was established by the United Nations in 2018 and first observed in 2019. It recognizes the importance of global cooperation in resolving conflicts. It promotes dialogue, diplomacy, and collective action as tools for maintaining international peace and security. The day reaffirms the principles of the UN Charter, reminding countries of their shared responsibility to work together for the greater good of humanity.
National Arbor Day
National Arbor Day* (Last Friday in April) encourages individuals, schools, and communities to take action in growing and protecting trees. The day was founded in Nebraska in 1872 by Julius Sterling Morton, who believed that trees were essential to the health of the land and its people. Today, Arbor Day serves as a reminder of the vital role trees play in cleaning the air, providing shade, preventing soil erosion, and supporting wildlife. It is observed in many countries around the world, each choosing a date that best suits their local planting season.
🌳 Similar days include International Day of Forests on March 21.
National Bucket List Day
National Bucket List Day was created in 2022 by travel blogger and agent Cindy Lee to remind people to stop putting off the experiences, goals, and adventures that matter most to them. The day encourages people to break out of their routines and take a step toward making their dreams happen, no matter how big or small.
National Hairball Awareness Day
National Hairball Awareness Day* (Last Friday in April) was created by Dr. Blake Hawley of Hill’s Pet Nutrition to remind cat owners about the health risks that hairballs pose to their pets and to encourage preventive care. The day serves as a prompt for cat owners to talk to their vet, consider dietary changes, and brush their cats regularly to reduce the amount of hair they ingest.
🐈 See also our complete list of national days dedicated to cats and their owners.
National Historic Marker Day
National Historic Marker Day* (Last Friday in April but now expanded to a full weekend) was established by the William G. Pomeroy Foundation to highlight the value that historic markers bring to communities across the country and to encourage people to help preserve them.
There are more than 227,000 historic markers across the United States, found along roadsides, in parks, on downtown streets, and at historic sites, yet many have gone years without any maintenance. The event invites neighbors, friends, and families nationwide to get outside, clean and care for markers in their communities, and celebrate local history.
National Neck Care Day
National Neck Care Day was first observed in 2025. It was created by NEOSTRATA® to encourage people to include their neck in their daily skincare routine, since the neck is one of the first areas of the body to show visible signs of aging yet is frequently overlooked.
National Pet Care for All Day
National Pet Care for All Day was founded in 2024 by East Bay SPCA, one of the oldest animal shelters in the U.S. It highlights the need for accessible pet care. It supports the ideas that everyone, regardless of income, housing situation, or access to resources, deserves to experience the bond that comes with having an animal companion. The day draws attention to the many organizations working to make veterinary care, behavioral support, and other pet services affordable and available to all families. Keeping pets in their homes also helps reduce overcrowding in animal shelters, making it a benefit to the wider community as well.
National Pigs-in-a-Blanket Day
National Pigs-in-a-Blanket Day celebrates a popular party snack made by wrapping small sausages or hot dogs wrapped in soft dough or crescent roll pastry and baked until golden. The day gives people a reason to make, share, and enjoy this comfort food, whether at home, at a gathering, or as part of a celebration.
National Skipping Day
National Skipping Day was first organized in 2002 by Skipping Workshops in the UK. It encourages children to stay active by rope skipping. Over 50,000 children from around 250 schools take part annually in activities that promote physical health through jump rope games and techniques. While skipping might seem like child’s play, it builds coordination, stamina, and cardiovascular strength. This day reminds us that fitness can be fun and accessible, especially for kids.
New Kids on the Block Day
New Kids on the Block Day honors the Boston-born boy band that became one of the biggest pop sensations of the late 1980s. The group, made up of Donnie Wahlberg, Joey McIntyre, Danny Wood, and brothers Jonathan and Jordan Knight, sold more than 80 million records worldwide and helped pave the way for future boy bands like the Backstreet Boys and NSYNC.
The day was established on April 24, 1989, when Massachusetts Governor Michael Dukakis declared it an official observance to recognize the band’s impact. It has been marked annually ever since, giving fans a dedicated moment to revisit the music and memories tied to the group’s heyday.
Scream Day
Scream Day exists because modern life tends to build up a lot of pent-up anxiety and pressure, and people need healthy ways to channel it. The observance invites people to find a safe space, take a deep breath, and scream as loud as you can. The act of screaming can help clear the mind, reduce stress, and leave you feeling refreshed.
Screaming as a therapeutic method has roots going back to ancient China and continues to be used in psychotherapy today. Some people find that a good scream helps relieve tension and allows them to approach their problems with a clearer mind, and may even trigger a release of endorphins, the brain’s natural feel-good chemicals.
Undiagnosed Children’s Awareness Day
Undiagnosed Children’s Awareness Day 🇬🇧* (Last Friday in April) is led by the UK-based charity SWAN (Syndromes Without a Name) to bring attention to the thousands of children around the world who live with rare or complex medical conditions that doctors have not yet been able to identify or name.
Each year, approximately 6,000 children in the UK alone are born without a clear diagnosis, leading to uncertainty and difficulty accessing care. The day encourages greater investment in medical research, raises awareness among healthcare professionals, and reminds the public that behind every undiagnosed case is a child and a family searching for answers.
World Day for Laboratory Animals
World Day for Laboratory Animals was founded in 1979 by the National Anti-Vivisection Society in the UK and is recognized by the United Nations. The day exists to raise awareness about the millions of animals used in scientific and medical testing around the world each year. It honors the suffering of those animals and calls attention to the urgent need for humane, animal-free alternatives in research and testing.
It is also the focal point of World Week for Animals in Laboratories, a longer period of global advocacy encouraging governments, institutions, and the public to support a future where science no longer depends on animal experimentation.
World Women’s Wellness Day
World Women’s Wellness Day* (Last Friday in April) was created in 2021 by Diversity Woman Media, a U.S.-based media company focused on women’s leadership and personal growth. Women often place their own health and wellness behind the needs of those around them, including children, spouses, and parents.
It was established to raise awareness about women’s health issues, empower women to make their health a priority, and encourage society to support equal access to care and wellness resources. The focus spans physical, mental, and emotional wellbeing, from annual check-ups and exercise to stress management and mental health support.
