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Nature Environment observances

Nature, ecosystems, environmental awareness and conservation.

Curated facet guide

About this facet

This facet covers broad environmental observances involving ecosystems, climate, land, water, biodiversity or environmental stewardship.

Scope note: Environmental claims and recommended actions should be supported by current scientific or local expert guidance.
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Reviewed depth

In-depth guides in Nature Environment

These pages include reviewed meaning, history, activities, facts and FAQs in addition to the underlying authority record.

Source-backedFixed AnnualIn-depth guide

Earth Day

22 April · Worldwide / EARTHDAY.ORG campaign

EARTHDAY.ORG’s current 2026 page identifies Earth Day 2026 as Wednesday, 22 April.

181 records

Authority records

Source-backedEdition Specific

150th Westminster Kennel Club Dog Show

31 January and 2–3 February 2026 · New York City / Westminster Kennel Club 2026 edition

The Westminster Kennel Club’s first-party 150th-event materials place 2026 competition across January 31 and February 2–3.

Source-backedHistorical Legacy

American Eagle Day

20 June in repeated Senate designations; current-year status should be rechecked · United States — congressional conservation-awareness designation history

Repeated U.S. Senate resolutions, including S. Res. 146 (2007) and later designations

Source-backedRule Based Annual

Arbor Day

Last Friday in April; 24 April 2026 · United States; tree-planting and stewardship observance promoted by the Arbor Day Foundation

The Arbor Day Foundation describes National Arbor Day as the last Friday in April; in 2026 that is 24 April.

Source-backedEdition Specific

Big Garden Birdwatch

23–25 January 2026 · United Kingdom / RSPB

The RSPB’s official 2026 Big Garden Birdwatch material states that the event takes place 23–25 January 2026 and describes it as an annual garden wildlife survey in the UK.

Source-backedFixed Annual

California Poppy Day

6 April annually · California, United States / state-designated educational observance

California Department of Education cites Education Code section 37222.12, which designates April 6 of each year as California Poppy Day.

Source-backedRule Based Annual

Clean Up Australia Day

First Sunday in March · Australia-wide community environmental clean-up campaign

Clean Up Australia, official organizer

Source-backedEdition Specific

December solstice

21 December 2026 at 20:50 UT · Global astronomical event / USNO 2026 season table

The U.S. Naval Observatory gives the December 2026 solstice at 20:50 UT on 21 December.

Source-backedEdition Specific

December solstice (Northern Hemisphere winter solstice)

21 December 2026 at 20:50 UT · Astronomical event / Northern Hemisphere seasonal naming

The U.S. Naval Observatory gives the December 2026 solstice at 20:50 UT on 21 December; seasonal naming depends on hemisphere.

Source-backedEdition Specific

Discover National Parks Fortnight

2–18 April in the documented 2022 edition · UK National Parks / legacy campaign edition

National Parks UK documented the 2022 Discover National Parks Fortnight running from April 2–18 after a two-year hiatus.

Source-backedEdition Specific

Earth at perihelion

3 January 2026 at 17:15 UT · Global astronomical event / USNO 2026 season table

The U.S. Naval Observatory’s 2026 Earth seasons table gives perihelion at 17:15 UT on 3 January 2026.

Source-backedFixed AnnualIn-depth guide

Earth Day

22 April · Worldwide / EARTHDAY.ORG campaign

EARTHDAY.ORG’s current 2026 page identifies Earth Day 2026 as Wednesday, 22 April.

Source-backedEdition Specific

Earth Hour

28 March 2026, 8:30 p.m. local time · Worldwide / WWF Earth Hour

The official Earth Hour site lists 28 March 2026 at 20:30 and invites people to give an hour for Earth.

Source-backedEdition Specific

Earth Overshoot Day

30 July 2026 · Global Footprint Network calculation / worldwide

Global Footprint Network’s 2026 announcement places Earth Overshoot Day on 30 July 2026 and explains it as the date when humanity’s demand for ecological resources/services exceeds what Ear…

Source-backedRule Based Annual

Endangered Species Day

Third Friday in May · United States conservation awareness observance

U.S. Fish & Wildlife Service

Source-backedEdition Specific

Fête du travail et de l’Agriculture (Agriculture and Labor Day)

1 May 2026 · Haiti / national holiday (2026 official calendar)

The Embassy of Haiti in Washington lists Fête du travail et de l’Agriculture on 1 May 2026 and identifies Agriculture and Labor Day as a national holiday for that edition.

Source-backedFixed Annual

Global Cat Day

16 October · Worldwide / Alley Cat Allies campaign

Alley Cat Allies identifies 16 October as Global Cat Day and describes it as its campaign centered on cats and communities.

Source-backedFixed Annual

Global Wind Day

15 June · international wind-energy awareness observance

WindEurope and global wind-energy partners

Source-backedEdition Specific

Great Backyard Bird Count

13–16 February 2026 · Global citizen-science bird count

The Great Backyard Bird Count’s official participation page identifies February 13–16, 2026 and explains that participants watch birds for at least 15 minutes and submit observations throug…

Source-backedFixed Annual

Greenery Day (Midori no Hi)

4 May · Japanese national holiday

Cabinet Office of Japan; Act on National Holidays

Source-backedRule Based Annual

Hagfish Day

Third Wednesday in October (21 October in 2026) · International / WhaleTimes ocean-education initiative

WhaleTimes states that it created Hagfish Day in 2009 and its own materials specify the third Wednesday of every October.

Source-backedVariable Custom

Harela festival

annual; date follows the regional Hindu calendar and should be checked each year · Uttarakhand regional festival, India

Government of Uttarakhand

Source-backedFixed Annual

Houseplant Appreciation Day

10 January · Gardener’s Network-created houseplant appreciation observance

Gardener’s Network explicitly identifies itself as the creator of Houseplant Appreciation Day and proclaims 10 January each year; an independent observance reference corroborates the date a…

Source-backedEdition Specific

Iditarod Trail Sled Dog Race

Ceremonial start 7 March 2026; official restart 8 March 2026 · Alaska, United States / annual sled-dog race

The Iditarod Trail Committee’s 2026 race rules set the official starting date for March 7, 2026 in Anchorage and the restart for March 8, 2026 in Willow; its official results document the 2…

Source-backedFixed Annual

International Animal Rights Day

10 December every year · Global animal-rights / animal-welfare advocacy observance

World Animal Protection states that International Animal Rights Day is observed on December 10 every year and is used to advocate for recognition and protection of animals as sentient being…

Source-backedFixed Annual

International Beaver Day

7 April · International / beaver conservation awareness

The Smithsonian’s National Zoo identifies 7 April as International Beaver Day, and a current municipal conservation notice also recognizes the date.

Source-backedFixed Annual

International Cat Day

8 August · Global cat-welfare awareness / International Cat Care

International Cat Care identifies International Cat Day on August 8 and describes itself as the custodian/coordinator of the day.

Source-backedFixed Annual

International Cheetah Day

4 December · international cheetah conservation awareness observance

Cheetah Conservation Fund (CCF)

Source-backedFixed Annual

International Clouded Leopard Day

4 August · international clouded-leopard awareness observance

The Aspinall Foundation initiative, corroborated by World Animal Protection

Source-backedRule Based Annual

International Dawn Chorus Day

First Sunday in May; 3 May in 2026 · The Wildlife Trusts / international nature-listening participation

The Wildlife Trusts identifies International Dawn Chorus Day on the first Sunday in May and describes the celebration of birdsong at dawn

Source-backedFixed Annual

International Day of Action for Rivers

14 March · international river-protection and community-rights action observance

International Rivers and the 1997 International Meeting of People Affected by Dams

Source-backedFixed Annual

International Doodle Dog Day

1 May · International / creator-led doodle-dog community observance

The official International Doodle Dog Day site states that doodle dog lovers celebrate every year on May 1 and identifies Jeannie North as the founder.

Source-backedFixed Annual

International Environmental Education Day

26 January · International / environmental-education awareness observance recognized by education and biodiversity institutions

Environmental-education institutions mark January 26 as International/World Environmental Education Day. The evidence supports the recurring date but is not used to claim a current UN-desig…

Source-backedFixed AnnualIn-depth guide

International Geodiversity Day

6 October · UNESCO international day

Proclaimed by UNESCO General Conference in 2021

Source-backedRule Based Annual

International Guide Dog Day

Last Wednesday in April each year · International guide-dog community / IGDF

The International Guide Dog Federation states that International Guide Dog Day is celebrated on the last Wednesday in April each year and raises awareness of guide-dog services and their ro…

Source-backedVariable Custom

International Heritage Breeds Day

Saturday at the end of International Heritage Breeds Week in May · international livestock-breed conservation observance

The Livestock Conservancy

Source-backedFixed AnnualIn-depth guide

International Mountain Day

11 December · United Nations international observance

A/RES/57/245

Source-backedFixed Annual

International Mud Day

29 June · international early-childhood nature-play observance

World Forum Foundation / Nature Action Collaborative for Children

Source-backedFixed Annual

International Orangutan Day

19 August each year · Orangutan conservation community / international awareness

Orangutan Foundation identifies International Orangutan Day on August 19 and uses the date for orangutan conservation awareness

Source-backedVariable Custom

International Permaculture Day

First Sunday in May or thereabouts · International permaculture community / event-listing initiative

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.

Source-backedFixed Annual

International Plastic Bag Free Day

3 July · Environmental NGO campaign focused on reducing single-use plastic bags

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.

Source-backedFixed Annual

International Polar Bear Day

27 February · Worldwide / Polar Bears International

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.

Source-backedRule Based Annual

International Rabbit Day

fourth Saturday of September; 26 September 2026 · International / rabbit welfare awareness

World Animal Protection describes International Rabbit Day as occurring on the fourth Saturday of September and gives 26 September for 2026.

Source-backedRule Based Annual

International Red Panda Day

Third Saturday of September · international red-panda conservation awareness observance

Red Panda Network

Source-backedFixed Annual

International Respect for Chickens Day

4 May · International / United Poultry Concerns advocacy project

United Poultry Concerns identifies International Respect for Chickens Day as an annual May 4 project and traces the campaign to its 2005 launch.

Source-backedFixed Annual

International Sloth Day

20 October · sloth awareness and conservation observance

sloth-conservation organizations; origin attributed to Fundación AIUNAU

Source-backedFixed Annual

International Sunflower Guerrilla Gardening Day

1 May · International / guerrilla-gardening community observance

GuerrillaGardening.org documents International Sunflower Guerrilla Gardening Day on 1 May and says Brussels guerrilla gardeners declared it in 2007.

Source-backedRule Based Annual

International Surfing Day

Third Saturday of June · global surfing and coastal-protection observance

Surfrider Foundation

Source-backedFixed Annual

International Tiger Day / Global Tiger Day

29 July each year · Global tiger conservation awareness

WWF identifies Global Tiger Day, also widely called International Tiger Day, on 29 July as a day focused on tiger conservation awareness

Source-backedFixed Annual

International Whale Shark Day

30 August annually in current conservation usage · International / whale-shark conservation awareness

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.

Source-backedFixed Annual

International Zebra Day

31 January in cited zoo and government sources · Wildlife awareness and zebra conservation observance

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…

Source-backedRule Based Annual

IOSF World Otter Day

Last Wednesday in May annually · International / International Otter Survival Fund campaign

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.

Source-backedEdition Specific

June solstice (Northern Hemisphere summer solstice)

21 June 2026 at 08:24 UT · Astronomical event / Northern Hemisphere seasonal naming

The U.S. Naval Observatory gives the June 2026 solstice at 08:24 UT on 21 June; seasonal naming depends on hemisphere.

Source-backedRule Based Annual

Lake Superior Day

Third Sunday in July (19 July in 2026) · Lake Superior basin / binational U.S.–Canada environmental appreciation observance

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.