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International Heritage Breeds Day
The Livestock Conservancy
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Animals, Nature & Environment observances
Animals, wildlife, habitats, conservation, environmental awareness and nature-focused observances.
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Authority records
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International Mother Earth Day
A/RES/63/278
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International Mountain Day
A/RES/57/245
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International Mud Day
World Forum Foundation / Nature Action Collaborative for Children
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International Orangutan Day
Orangutan Foundation identifies International Orangutan Day on August 19 and uses the date for orangutan conservation awareness
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International Permaculture Day
The official International Permaculture Day site describes the observance as taking place on the first Sunday in May “or thereabouts,” with local events allowed on or near the focal date.
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International Plastic Bag Free Day
Zero Waste Europe documents the International Plastic Bag Free Day campaign on July 3 and frames it around reducing lightweight plastic carrier-bag consumption and pollution.
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International Polar Bear Day
Polar Bears International’s official event page identifies 27 February as International Polar Bear Day and describes the organization’s campaign around polar bear conservation.
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International Rabbit Day
World Animal Protection describes International Rabbit Day as occurring on the fourth Saturday of September and gives 26 September for 2026.
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International Red Panda Day
Red Panda Network
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International Rescue Cat Day
The Animal Medical Center’s veterinary-awareness calendars list International Rescue Cat Day on 2 March across multiple editions. This verifies the stable date as an institutional awareness…
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International Respect for Chickens Day
United Poultry Concerns identifies International Respect for Chickens Day as an annual May 4 project and traces the campaign to its 2005 launch.
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International Sloth Day
sloth-conservation organizations; origin attributed to Fundación AIUNAU
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International Sunflower Guerrilla Gardening Day
GuerrillaGardening.org documents International Sunflower Guerrilla Gardening Day on 1 May and says Brussels guerrilla gardeners declared it in 2007.
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International Tiger Day / Global Tiger Day
WWF identifies Global Tiger Day, also widely called International Tiger Day, on 29 July as a day focused on tiger conservation awareness
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International Whale Shark Day
Wildlife Trust of India’s 2026 observance page states that International Whale Shark Day is marked every year on 30 August and documents its own continuing participation.
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International Zebra Day
Smithsonian’s National Zoo uses 31 January for International Zebra Day, and a 2026 Taiwan government news service item likewise identifies 31 January and documents zoo programming around th…
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IOSF World Otter Day
The International Otter Survival Fund states that it established IOSF World Otter Day and that it takes place on the last Wednesday in May each year.
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June solstice (Northern Hemisphere summer solstice)
The U.S. Naval Observatory gives the June 2026 solstice at 08:24 UT on 21 June; seasonal naming depends on hemisphere.
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Lake Superior Day
The U.S. National Park Service and EPA Lake Superior management materials describe Lake Superior Day as an annual event on the third Sunday in July.
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March equinox
The U.S. Naval Observatory gives the March 2026 equinox at 14:46 UT on 20 March.
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March equinox (Northern Hemisphere spring equinox)
The U.S. Naval Observatory gives the March equinox at 14:46 UT on 20 March 2026; its season guidance notes that seasonal naming conventions are hemisphere-dependent.
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March equinox / astronomical spring begins (Northern Hemisphere)
The U.S. Naval Observatory publishes target-year equinox instants and explains that equinoxes mark the beginning of spring or autumn depending on hemisphere.
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Marine Day (Umi no Hi)
Cabinet Office, Government of Japan
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Marine Mammal Rescue Day
Los Angeles County Board material records a motion and subsequent agenda action to proclaim 27 April 2026 Marine Mammal Rescue Day throughout Los Angeles County.
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Marmot Day
Alaska legislation establishes 2 February of each year as Marmot Day and provides for suitable observance; Alaska State Archives also lists the day among state-designated dates.
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Mountain Day (山の日)
Japan’s Cabinet Office lists Mountain Day on 11 August 2026 among the national holidays and describes its purpose as an opportunity to become familiar with mountains and appreciate their be…
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Mule Day
The City of Columbia identifies Mule Day as its historic signature event, while the organizer publishes a target-year multi-day schedule. The official event is “Mule Day,” not a nationwide…
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National Adopt a Shelter Pet Day
ASPCA material identifies April 30 as National Adopt a Shelter Pet Day, and a municipal animal shelter calendar also schedules the 2026 observance on April 30.
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National Ag Day
Agriculture Council of America
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National Alligator Day
Wild Florida says it created National Alligator Day on May 29 in 2021 to raise awareness and improve understanding of alligators and their ecosystem role.
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National American Paddlefish Day
Shreveport Aquarium states that it obtained certification in 2019 for National American Paddlefish Day to be observed on March 9 each year.
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National Animal Advocacy Day
The ASPCA explicitly promotes National Animal Advocacy Day on 30 April, and New York legislative resolutions provide additional civic recognition.
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National Animal Crackers Day
National Day Archives lists the canonical plural National Animal Crackers Day on April 18; the public singular title is retained as an alias.
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National Arabian Horse Day
Arabian-horse industry and observance registry sources identify the Arabian Horse Association of Arizona as founder and February 19 as the annual observance date.
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National Bird Day
The Avian Welfare Coalition states it established National Bird Day on January 5 as a day of action and education concerning captive birds.
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National Bison Day
The U.S. National Park Service states National Bison Day has been observed annually on the first Saturday in November since 2012.
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National Black Bear Day
The National Black Bear Festival states that it secured the National Black Bear Day designation and that the day is celebrated on the first Saturday in June each year.
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National Black Cat Day
Cats Protection states National Black Cat Day is held each year on October 27 and that it created the campaign in 2011.
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National Black Dog Day
Founder Colleen Paige’s current materials list National Black Dog Day on October 1 and describe it as an annual awareness observance.
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National Brown Dog Day
National Day Archives records National Brown Dog Day on February 2 each year and identifies Debra Loveless Williams as the creator in 2021.
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National Bugs Bunny Day
National Day Calendar and National Today independently place National Bugs Bunny Day on April 30 as an annually recurring informal observance.
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National Bulldogs Are Beautiful Day
Truman State University repeatedly identifies April 21 as National Bulldogs Are Beautiful Day, and major pet-industry calendars also place Bulldogs Are Beautiful Day on April 21.
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National Cat Day
Founder Colleen Paige’s current holiday list places National Cat Day on October 29; U.S. public institutions also recognize the date in programming and resolutions.
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National Cat DNA Day
National Day Archives records September 19 and identifies Basepaws as the 2020 founder; Basepaws continues to reference National Cat DNA Day in its own materials.
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National Cat Lady Day
CatCon states that founder Susan Michals created National Cat Lady Day in 2017 and that it takes place each year on April 19.
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National Check the Chip Day
American Veterinary Medical Association material identifies National Check the Chip Day as August 15 every year.
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National Chili Dog Day
National Today and Days Of The Year independently define Chili Dog Day as the last Thursday in July each year.
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National Cook For Your Pets Day
The Animal Medical Center repeatedly lists National Cook for Your Pets Day on November 1 in its annual pet-holiday and veterinary-awareness calendars.
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National Corn Dog Day
National Day Calendar identifies Brady Sahnow and Henry Otley as creators of the 1992 observance and marks the date as changing annually; SONIC celebrated it on March 15, 2025 and Kirby Fam…
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National Day of the Horse
The U.S. Senate agreed to S. Res. 452 designating December 13, 2004 as National Day of the Horse; the American Horse Council continues to recognize December 13 as National Day of the Horse.
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National Devil Dog Day
National Day Calendar’s proclamation record identifies Sean Alexander Sobel as the founder of National Devil Dog Day and proclaims April 27 as the annual observance date.
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National Diatomaceous Earth Day
EP Minerals states that it founded National Diatomaceous Earth Day, that National Day Calendar approved the day in 2016, and that the observance is on August 31.
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National Dog Biscuit Day
The American Kennel Club Gazette explicitly references National Dog Biscuit Day as February 23.
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National Dog Day
Founder Colleen Paige’s current holiday list identifies National Dog Day on August 26; the National Dog Day site describes the annual observance and its founding.
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National Dog Party Day
Current observance references identify June 21 as the recurring date and attribute creation in 2011 to pet author and safety educator Arden Moore.
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National Dog Photography Day
Creator Kerry Jordan explains that she created the observance, selected July 26 and launched it in 2018; current 2026 coverage continues to use July 26.
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National Dolphin Day (India)
India’s Press Information Bureau reports that the Standing Committee of the National Board for Wild Life recommended 5 October be celebrated every year as National Dolphin Day to raise cons…
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National Dress Up Your Pet Day
Pet-lifestyle advocate Colleen Paige lists National Dress Up Your Pet Day on 14 January, and observance registries attribute its creation to her.
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National Farm Animals Day
Observance and historical-society sources identify April 10 as National Farm Animals Day and trace its creation to Colleen Paige in 2005.
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National Feral Cat Day®
Alley Cat Allies states it created National Feral Cat Day in 2001 and that the observance falls on October 16.
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National Find a Rainbow Day
The Georgia Lottery has run an official National Find a Rainbow Day promotion on 3 April, while other institutional/brand calendars also use April 3. This supports the stable informal date…
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National Fish Taco Day
National Day Archives records National Fish Taco Day on January 25 and attributes its creation to Rubio’s Coastal Grill in 2018; current event listings continue to tie the date to Rubio’s p…
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National Flower Day
National Today gives National Flower Day a fixed March 21 recurrence, while The Old Farmer’s Almanac independently lists National Flower Day on March 21 in successive yearly calendars.
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National Fossil Day
National Park Service current National Fossil Day program
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National Frog Jumping Day
National Day Calendar lists National Frog Jumping Day on May 13, and the Richmond Public Library independently includes May 13 while noting the Mark Twain frog-jumping literary connection.
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National Garden Meditation Day
The National Garden Scheme explicitly promoted National Garden Meditation Day on Monday 3 May in 2021. The available first-party evidence verifies that edition but does not establish a safe…
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National Gardening Day
USDA’s National Institute of Food and Agriculture lists April 14 as National Gardening Day in its 2026 social-media toolkit.
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National Gardening Exercise Day
University of Nevada, Reno Extension’s 2026 gardening calendar lists June 6 as National Gardening Exercise Day. The institutional evidence confirms the 2026 date but does not by itself prov…
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National Garfield the Cat Day
National Day Archives lists National Garfield the Cat Day on June 19; this matches Garfield’s widely recognized June 19 birthday, but the authority record remains narrowly registry/date sco…
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National Get Out of the Dog House Day
National Day Archives explicitly states that National Get Out of the Dog House Day is celebrated on the third Monday of July.
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National Go Birding Day
The U.S. Bureau of Land Management and state public-lands calendars acknowledge National Go Birding Day on April 25, 2026. Available first-party evidence establishes the 2026 edition but do…