Source-backedFixed AnnualIn-depth guide
America Recycles Day®
Keep America Beautiful identifies America Recycles Day on November 15 as its national recycling-awareness program
Topic facet
Environment Conservation observances
Conservation-focused observances and habitat or species protection.
About this facet
These pages focus more specifically on conservation, restoration, biodiversity and protection of natural systems.
Scope note: Participation advice should avoid disturbing wildlife or encouraging actions that are ecologically inappropriate for a local area.
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Reviewed depth
In-depth guides in Environment Conservation
These pages include reviewed meaning, history, activities, facts and FAQs in addition to the underlying observance record.
Source-backedFixed AnnualIn-depth guide
Earth Day
EARTHDAY.ORG’s current 2026 page identifies Earth Day 2026 as Wednesday, 22 April.
Source-backedFixed AnnualIn-depth guide
International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
A/RES/56/4
Source-backedFixed AnnualIn-depth guide
International Day for the Conservation of the Mangrove Ecosystem
Established by UNESCO in 2015
Source-backedFixed AnnualIn-depth guide
International Day of Action for Rivers
International Rivers states that participants at the first International Meeting of People Affected by Dams in Curitiba, Brazil, adopted the International Day of Action Against Dams and For…
Source-backedFixed AnnualIn-depth guide
International Day of Forests
A/RES/67/200
30 observances
All observances
Source-backedFixed AnnualIn-depth guide
America Recycles Day®
Keep America Beautiful identifies America Recycles Day on November 15 as its national recycling-awareness program
Source-backedFixed AnnualIn-depth guide
Earth Day
EARTHDAY.ORG’s current 2026 page identifies Earth Day 2026 as Wednesday, 22 April.
Source-backedFixed AnnualIn-depth guide
International Day for Preventing the Exploitation of the Environment in War and Armed Conflict
A/RES/56/4
Source-backedFixed AnnualIn-depth guide
International Day for the Conservation of the Mangrove Ecosystem
Established by UNESCO in 2015
Source-backedFixed AnnualIn-depth guide
International Day of Action for Rivers
International Rivers states that participants at the first International Meeting of People Affected by Dams in Curitiba, Brazil, adopted the International Day of Action Against Dams and For…
Source-backedFixed AnnualIn-depth guide
International Day of Forests
A/RES/67/200
Source-backedFixed AnnualIn-depth guide
International Day of Plant Health
A/RES/76/256
Source-backedFixed AnnualIn-depth guide
International Environmental Education Day
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 Mother Earth Day
A/RES/63/278
Source-backedFixed AnnualIn-depth guide
National Black Forest Cake Day
ANFP Wyoming and Wisconsin chapter calendars list National Black Forest Cake Day on March 28.
Source-backedFixed AnnualIn-depth guide
National Controlled Environment Certifier Day
Controlled Environment Testing Association (CETA) first-party material states that CETA established National Controlled Environment Certifier Day, sponsored its creation in 2025, and observ…
Source-backedFixed AnnualIn-depth guide
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.
Source-backedFixed AnnualIn-depth guide
National Energy Conservation Day
India’s Bureau of Energy Efficiency states that December 14 was declared National Energy Conservation Day and that the annual awards function is organized on December 14 each year.
Source-backedFixed AnnualIn-depth guide
National Ranch Water Day
RANCH2O Spirits currently states that it gave Ranch Water a national holiday and publishes April 11; the creator-submitted National Day Archives record dates creation to February 2021 and a…
Source-backedVariable CustomIn-depth guide
National River Cleanup®
American Rivers operates National River Cleanup® as a network of cleanup events held throughout the year; organizers register an event date, so there is no single universal recurring Nation…
Source-backedRule Based AnnualIn-depth guide
National Skip the Straw Day
Contemporaneous institutional coverage and National Day Calendar records identify the Whitehall Middle School Coral Keepers, with adviser Susan Tate, as the student group behind the 2017 ob…
Source-backedRule Based AnnualIn-depth guide
National Tree Day
Planet Ark says Australia’s National Tree Day began in 1996 and is held on the last Sunday in July; its official materials also document the program’s founding history and locally adaptable…
Source-backedFixed AnnualIn-depth guide
National Wildlife Day
Creator Colleen Paige’s current site identifies her as founder and lists National Wildlife Day on September 4. Sacramento Zoo corroborates a 2005 founding and separately notes February 22 u…
Source-backedRule Based AnnualIn-depth guide
Tree Dressing Day
Common Ground states that Tree Dressing Day falls on the first weekend of December and was initiated by the organization in 1990.
Source-backedRule Based AnnualIn-depth guide
Use Less Stuff Day
EPA’s 1996 Reusable News documents the first annual Use Less Stuff Day on 16 November 1995, one week before Thanksgiving, and identifies the original campaign coalition; contemporary Washin…
Source-backedEdition SpecificIn-depth guide
Waste & Recycling Workers Week
The official organizer says John D. Arwood created the observance in 2012, that National Garbage Man Day was officially renamed Waste & Recycling Workers Week in 2019 for the 2020 celebrati…
Source-backedFixed AnnualIn-depth guide
World Bee Day
A/RES/72/211
Source-backedFixed AnnualIn-depth guide
World Environment Day
A/RES/2994 (XXVII)
Source-backedFixed AnnualIn-depth guide
World Oceans Day
A/RES/63/111
Source-backedFixed AnnualIn-depth guide
World Olive Tree Day
Proclaimed at UNESCO’s 40th General Conference (2019)
Source-backedFixed AnnualIn-depth guide
World Plant Milk Day
The World Plant Milk Day campaign identifies 22 August as its annual date, while ProVeg documents the campaign’s 2017 launch with Plant Based News.
Source-backedFixed AnnualIn-depth guide
World Plant-Based Burger Day
VeganBurg launched World Plant-Based Burger Day on October 10, 2020 as part of its tenth-anniversary campaign.
Source-backedRule Based AnnualIn-depth guide
World Rivers Day
World Rivers Day organizers; global initiative launched in 2005 alongside the UN Water for Life Decade
Source-backedFixed AnnualIn-depth guide
World Water Day
A/RES/47/193
Source-backedFixed AnnualIn-depth guide
World Wildlife Day
A/RES/68/205