Nature and animals: 292 holidays
January
- January 7 · Old Rock Day
- January 11 · Russia's Nature Reserves and National Parks Day
- January 15 · Arbor Day in Jordan
- January 17 · World Waterfowl Day
- January 18 · World Snow Day
- January 20 · Penguin Awareness Day
- January 22 · Answer Your Cat's Questions Day
- January 26 · International Day of Clean Energy
- January 31 · International Water Purification Day
- January 31 · International Zebra Day
February
- February 2 · World Wetlands Day
- February 2 · Sled Dog Day
- February 2 · Groundhog Day in Canada
- February 2 · Groundhog Day in the United States
- February 2 · Tu BiShvat (New Year for Trees)
- February 3 · Golden Retriever Day
- February 5 · World Animal Reiki Day
- February 6 · Chiang Mai Flower Festival
- February 10 · World Pulses Day
- February 10 · International Day of the Arabian Leopard
- February 12 · Darwin Day
- February 15 · World Hippo Day
- February 16 · Kyoto Protocol Day
- February 18 · Battery Day
- February 19 · World Marine Mammal Day
- February 19 · Ornithologist Day in Russia
- February 20 · Love Your Pet Day
- February 20 · Hoodie-Hoo Day
- February 22 · Cat Day in Japan
- February 23 · International Dog Biscuit Appreciation Day
- February 27 · International Polar Bear Day
- February 28 · Arctic Day
March
- March 1 · Cat Day in Russia
- March 1 · Welcome Spring Day
- March 2 · International Rescue Cat Day
- March 3 · World Wildlife Day
- March 5 · World Energy Efficiency Day
- March 7 · World Plant Power Day
- March 9 · Pet Insect Day
- March 12 · Arbor Day in China
- March 13 · Thai National Elephant Day
- March 14 · International Day of Action for Rivers
- March 15 · International Day for the Protection of Seal Pups
- March 16 · International Panda Day
- March 19 · World Taxonomist Appreciation Day
- March 20 · Earth Day
- March 20 · Spring Equinox
- March 20 · International MeatOut Day
- March 20 · Hanami — Cherry Blossom Viewing in Japan
- March 21 · Tree Day in Italy
- March 21 · International Day of Nowruz
- March 21 · International Day of Forests
- March 22 · World Water Day
- March 22 · Baltic Sea Day
- March 22 · Soroki, the Festival of Larks
- March 23 · World Meteorological Day
- March 23 · Russian Hydrometeorological Service Workers' Day
- March 23 · Puppy Day
- March 28 · Earth Hour
- March 30 · Take a Walk in the Park Day
- March 30 · International Day of Zero Waste
April
- April 1 · International Bird Day
- April 1 · Istanbul Tulip Festival
- April 3 · World Aquatic Animal Day
- April 4 · World Rat Day
- April 5 · A Drop of Water Is a Grain of Gold Day in Turkmenistan
- April 5 · Geologist's Day
- April 5 · Arbor Day in South Korea
- April 7 · International Beaver Day
- April 8 · Plitvice Lakes National Park Day
- April 8 · Pygmy Hippo Day
- April 12 · International Hamster Day
- April 13 · Sham El-Nessim in Egypt
- April 15 · Environmental Awareness Day
- April 15 · Days of Protection from Environmental Hazards in Russia
- April 16 · Vodopol — the Water Spirit's Name Day
- April 16 · Save the Elephant Day
- April 18 · Ukraine Environment Day
- April 19 · Snowdrop Day
- April 19 · Russian Scrap Recycling Workers’ Day
- April 20 · International Cli-Fi Day
- April 21 · World Curlew Day
- April 22 · International Mother Earth Day
- April 23 · First Day of Summer in Iceland
- April 24 · World Day for Laboratory Animals
- April 24 · Arbor Day in the United States
- April 25 · World Penguin Day
- April 25 · World Veterinary Day
- April 26 · Akhal-Teke Horse Day in Turkmenistan
- April 28 · Chemical Safety Day
May
- May 1 · Beltane
- May 1 · International Sunflower Guerrilla Gardening Day
- May 2 · World Tuna Day
- May 3 · Sun Day
- May 4 · Greenery Day in Japan
- May 4 · International Respect for Chickens Day
- May 5 · Hıdırellez Spring Festival in Turkey
- May 6 · Anthestiria in Cyprus
- May 9 · Cyclists’ Day in the Netherlands
- May 10 · Flower Festival in Azerbaijan
- May 11 · Royal Ploughing Ceremony in Thailand
- May 12 · Environmental Education Day
- May 12 · International Day of Plant Health
- May 15 · Joint Action Days for Small Rivers and Water Bodies
- May 15 · International Climate Day
- May 18 · Fascination of Plants Day
- May 20 · World Bee Day
- May 20 · Volga Day
- May 22 · International Day for Biological Diversity
- May 23 · World Turtle Day
- May 23 · Azerbaijan Ecology Ministry Workers' Day
- May 24 · European Day of Parks
- May 24 · International Day of the Markhor
- May 25 · Baikal Seal Pup Day
- May 26 · Snow Leopard Day in Altai
- May 28 · World Dhole Day
- May 29 · International Everest Day
- May 30 · International Day of Potato
- May 30 · National Potato Day in Peru
- May 31 · World Parrot Day
June
- June 2 · World Peatlands Day
- June 3 · World Bicycle Day
- June 4 · Hug Your Cat Day
- June 5 · World Environment Day
- June 5 · Azerbaijan Water Management and Land Reclamation Workers' Day
- June 5 · Russian Plant Quarantine Service Day
- June 5 · International Day for the Fight against Illegal, Unreported and Unregulated Fishing
- June 5 · World Day Against Speciesism
- June 6 · World Green Roof Day
- June 7 · Land Reclamation Workers' Day in Russia
- June 7 · Water Management Workers' Day in Ukraine
- June 8 · World Oceans Day
- June 8 · World Saint Petersburg Cats Day
- June 11 · World Saltmarsh Day
- June 11 · International Lynx Day
- June 13 · Ladybug Day
- June 15 · Global Wind Day
- June 15 · Young Naturalists’ Movement Day in Russia
- June 16 · World Sea Turtle Day
- June 17 · World Day to Combat Desertification and Drought
- June 17 · World Croc Day
- June 18 · Sustainable Gastronomy Day
- June 19 · Butterfly Day in Russia
- June 20 · World Elephant Protection Day in Zoos
- June 20 · Juhannus (Midsummer) in Finland
- June 21 · Kyrgyzstan Water Management Workers’ Day
- June 21 · International Day of the Celebration of the Solstice
- June 22 · World Rainforest Day
- June 23 · St John's Eve (Midsummer Eve)
- June 24 · Upcycling Day
- June 27 · World Fishing Day
- June 29 · International Day of the Tropics
- June 29 · International Mud Day
- June 30 · International Asteroid Day
- June 30 · Meteor Watch Day
July
- July 2 · International Dog Day
- July 3 · International Plastic Bag Free Day
- July 4 · International Dnieper Day
- July 6 · World Rural Development Day
- July 7 · Russian Aerial Forest Protection Service Anniversary
- July 7 · Ivan Kupala
- July 10 · Don't Step on a Bee Day
- July 11 · World Horse Day
- July 12 · Day of Action Against Fishing in Russia
- July 12 · Fjord Day in Scandinavia
- July 12 · International Day of Combating Sand and Dust Storms
- July 14 · Currant Day
- July 14 · World Chimpanzee Day
- July 14 · International Shark Awareness Day
- July 15 · Arctic Sea Ice Day
- July 16 · World Snake Day
- July 18 · World Listening Day
- July 20 · Marine Day in Japan
- July 21 · Zazhinki
- July 21 · Take a Monkey to Lunch Day
- July 23 · World Whale and Dolphin Day
- July 26 · International Day for the Conservation of the Mangrove Ecosystem
- July 28 · World Nature Conservation Day
- July 29 · International Tiger Day
- July 30 · World Snorkeling Day
- July 31 · World Ranger Day
- July 31 · International Lifeguard Appreciation Day
August
- August 2 · World Four-Leaf Clover Day
- August 4 · International Clouded Leopard Day
- August 4 · International Owl Awareness Day
- August 7 · Particularly Preposterous Packaging Day
- August 8 · International Cat Day
- August 8 · International Mountaineering Day
- August 9 · Wildfire Prevention Day in the United States
- August 9 · Veterinary Medicine Workers' Day in Ukraine
- August 10 · International Biodiesel Day
- August 10 · World Lion Day
- August 11 · Porcini Mushroom Day
- August 11 · Mountain Day in Japan
- August 13 · International Wolf Day
- August 14 · World Lizard Day
- August 15 · World Stray Animals Day
- August 17 · Thrift Shop Day
- August 19 · Beekeeper's Day in Ukraine
- August 19 · Frontline Dog Day
- August 19 · International Orangutan Day
- August 20 · World Mosquito Day
- August 22 · World Plant Milk Day
- August 24 · Pärtel's Day
- August 26 · Dog Appreciation Day
- August 26 · World African Wild Dog Day
- August 27 · World Lake Day
- August 28 · Spozhinki Harvest Festival
- August 29 · Finnish Nature Day
- August 29 · International Day against Nuclear Tests
- August 30 · Lake Sevan Day in Armenia
- August 30 · International Whale Shark Day
- August 31 · Veterinary Workers’ Day in Russia
September
- September 1 · International Primate Day
- September 1 · World Beach Day
- September 2 · World Coconut Day
- September 6 · Lake Baikal Day in Russia
- September 7 · International Day of Clean Air for blue skies
- September 9 · Russian Onion Day
- September 13 · World Crane Day
- September 15 · Russian Forest Days
- September 16 · International Day for the Preservation of the Ozone Layer
- September 18 · World Water Monitoring Day
- September 20 · World Rice Day
- September 20 · World Cleanup Day
- September 20 · Forest Workers' Day
- September 21 · Zero Emissions Day
- September 21 · World Cleanup Week
- September 22 · World Car-Free Day
- September 22 · World Elephant Day
- September 22 · World Rhino Day
- September 23 · Autumn Equinox
- September 23 · Autumn Equinox Day in Japan
- September 24 · World Maritime Day
- September 28 · World Rabies Day
- September 29 · International Day of Awareness of Food Loss and Waste
October
- October 1 · World Vegetarian Day
- October 2 · World Farm Animals Day
- October 4 · World Animal Day
- October 4 · Harvest Thanksgiving in Germany
- October 5 · World Habitat Day
- October 6 · World Habitat Protection Day
- October 7 · World Cotton Day
- October 8 · World Octopus Day
- October 14 · Protected Area Workers' Day in Russia
- October 14 · International E-Waste Day
- October 16 · World Food Day
- October 17 · Bilberry Day
- October 18 · Britain's Horned God Day
- October 20 · International Sloth Day
- October 21 · Apple Day in England
- October 21 · Reptile Awareness Day
- October 22 · Russian Paper-Free Day
- October 23 · International Snow Leopard Day
- October 31 · World Cities Day
- October 31 · International Black Sea Action Day
- October 31 · Winter Nights
November
- November 1 · World Vegan Day
- November 3 · World Jellyfish Day
- November 5 · World Tsunami Awareness Day
- November 6 · International Remembrance Day for Animals Killed by Humans
- November 6 · International Day for Preventing Environmental Exploitation in War
- November 7 · Kekri in Finland
- November 9 · International Day of Anti-Nuclear Action
- November 11 · International Energy Saving Day
- November 12 · Titmouse Day
- November 15 · Recycling Day
- November 17 · Black Cat Protection Day
- November 19 · World Toilet Day
- November 19 · Hydrometeorological Service Workers' Day in Ukraine
- November 26 · World Sustainable Transport Day
- November 26 · World Olive Tree Day
- November 29 · International Jaguar Day
- November 30 · World Pet Day
December
- December 1 · Antarctica Day
- December 3 · International Day Against Pesticides
- December 4 · International Cheetah Day
- December 4 · World Wildlife Conservation Day
- December 5 · World Soil Day
- December 10 · International Animal Rights Day
- December 11 · International Mountain Day
- December 13 · Bear Day
- December 14 · International Monkey Day
- December 16 · Shaggy Day
- December 16 · Conquering Peaks Day
- December 19 · Look for an Evergreen Day
- December 20 · Yule
- December 21 · Winter Solstice
- December 21 · Karachun (Korochun)
- December 25 · Koliada
- December 25 · Nardugan
- December 27 · Visit the Zoo Day