Unbeknownst to Nelson, April 22, 1970, was coincidentally the 100th anniversary of the birth of Vladimir Lenin, when translated to the Gregorian calendar (which the Soviets adopted in 1918). Time reported that some suspected the date was not a coincidence, but a clue that the event was "a Communist trick", and quoted a member of the Daughters of the American Revolution as saying, "subversive elements plan to make American children live in an environment that is good for them." J. Edgar Hoover, director of the U.S. Federal Bureau of Investigation, may have found the Lenin connection intriguing; it was alleged the FBI conducted surveillance at the 1970 demonstrations. The idea that the date was chosen to celebrate Lenin's centenary still persists in some quarters, an idea borne out by the similarity with the subbotnik instituted by Lenin in 1920 as days on which people would have to do community service, which typically consisted in removing rubbish from public property and collecting recyclable material. Subbotniks were also imposed on other countries within the compass of Soviet power, including Eastern Europe, and at the height of its power the Soviet Union established a nationwide subbotnik to be celebrated on Lenin's birthday, April 22, which had been proclaimed a national holiday celebrating communism by Nikita Khrushchev in 1955.
One place where the interest in a teach-in was robust from the beginning was the University of Michigan. The very first teach-in on the Vietnam War had been held at the University of Michigan in March 1965, and a group of students, led by Doug Scott, decided to mark the five-year anniversary with an environmental teach-in on March 11–14, 1970. The Michigan teach-in presented a series of speeches dealing with various environmental problems, along with some debate over the best tactics and solutions. No one, including the president of Dow Chemical, argued for more environmental destruction.
In 1968, Morton Hilbert and the U.S. Public Health Service organized the Human Ecology Symposium, an environmental conference for students to hear from scientists about the effects of environmental degradation on human health. This was the beginning of Earth Day. For the next two years, Hilbert and students worked to plan the first Earth Day. In April 1970 – along with a federal proclamation from U.S. Sen. Gaylord Nelson – the first Earth Day was held.
In 1969 at a UNESCO Conference in San Francisco, peace activist John McConnell proposed a day to honor the Earth and the concept of peace, to first be observed on March 21, 1970, the first day of spring in the northern hemisphere. This day of nature's equipoise was later sanctioned in a proclamation written by McConnell and signed by Secretary General U Thant at the United Nations. A month later, United States Senator Gaylord Nelson proposed the idea to hold a nationwide environmental teach-in on April 22, 1970. He hired a young activist, Denis Hayes, to be the National Coordinator. Nelson and Hayes renamed the event "Earth Day". Denis and his staff grew the event beyond the original idea for a teach-in to include the entire United States. Key non-environmentally focused partners played major roles. Under the leadership of labor leader Walter Reuther, for example, the United Auto Workers (UAW) was the most instrumental outside financial and operational supporter of the first Earth Day. According to Hayes: "Without the UAW, the first Earth Day would have likely flopped!" Nelson was later awarded the Presidential Medal of Freedom award in recognition of his work. The first Earth Day was focused on the United States. In 1990, Denis Hayes, the original national coordinator in 1970, took it international and organized events in 141 nations. On Earth Day 2016, the landmark Paris Agreement was signed by the United States, the United Kingdom, China, and 120 other countries. This signing satisfied a key requirement for the entry into force of the historic draft climate protection treaty adopted by consensus of the 195 nations present at the 2015 United Nations Climate Change Conference in Paris. Numerous communities engaged in Earth Day Week actions, an entire week of activities focused on the environmental issues that the world faces. On Earth Day 2020, over 100 million people around the world observed the 50th anniversary in what is being referred to as the largest online mass mobilization in history. A similar but separate event, World Environment Day, is organized by the United Nations and observed annually on June 5.
On January 28, 1969, a well called Platform A, drilled by Union Oil 6 miles (10 km) off the coast of Santa Barbara, California, blew out. More than 3 million U.S. gallons (2.5 million imperial gallons; 11 million liters) of oil spilled, killing more than 10,000 seabirds, dolphins, seals, and sea lions. As a reaction to this disaster, activists were mobilized to create environmental regulation, environmental education, and Earth Day. Among the proponents of Earth Day were the people in the front lines of fighting this disaster, Selma Rubin, Marc McGinnes, and Bud Bottoms, founder of Get Oil Out. Denis Hayes, organizer of the first Earth Day, said that Senator Gaylord Nelson from Wisconsin was inspired to create Earth Day upon seeing an 800-square-mile (2,100 km ) oil slick from an airplane in the Santa Barbara Channel.
The seeds that grew into the first Earth Day were planted by Wisconsin Senator Gaylord Nelson. An ardent conservationist and former two-term governor of Wisconsin, Nelson had long sought ways to increase the potency of the environment as a political issue. The extraordinary attention garnered by Rachel Carson's 1962 book, Silent Spring, the famous 1968 Earthrise NASA photograph of the Earth from the Moon, the saturation news coverage given to the Santa Barbara oil spill and the Cuyahoga River catching fire in early 1969 led Nelson to think the time was ripe for an environmental initiative. As a result of interactions with his staff and with Fred Dutton, a prominent Democratic operative who had been Robert Kennedy's presidential campaign manager, Nelson became convinced that environmental teach-ins on college campuses could serve as such a vehicle.
On September 20, 1969, Senator Nelson first announced his plans for an "environmental teach-In" in a little-publicized talk at the University of Washington. "I am convinced that the same concern the youth of this nation took in changing this nation's priorities on the war in Vietnam and on civil rights can be shown for the problem of the environment. That is why I plan to see to it that a national teach-in is held."
Mobilizing 200 million people in 141 countries and lifting the status of environmental issues onto the world stage, Earth Day activities in 1990 gave a huge boost to recycling efforts worldwide and helped pave the way for the 1992 United Nations Earth Summit in Rio de Janeiro. Unlike the first Earth Day in 1970, this 20th Anniversary was waged with stronger marketing tools, greater access to television and radio, and multimillion-dollar budgets.
Project Survival, an early environmentalism-awareness education event, was held at Northwestern University on January 23, 1970. This was the first of several events held at university campuses across the United States in the lead-up to the first Earth Day. Also, Ralph Nader began talking about the importance of ecology in 1970.
Two separate groups formed to sponsor Earth Day events in 1990: The Earth Day 20 Foundation, assembled by Edward Furia (Project Director of Earth Week in 1970), and Earth Day 1990, assembled by Denis Hayes (National Coordinator for Earth Day 1970). Senator Gaylord Nelson, the original founder of Earth Day, was honorary chairman for both groups. The two did not combine forces over disagreements about leadership of combined organization and incompatible structures and strategies. Among the disagreements, key Earth Day 20 Foundation organizers were critical of Earth Day 1990 for including on their board Hewlett-Packard, a company that at the time was the second-biggest emitter of chlorofluorocarbons in Silicon Valley and refused to switch to alternative solvents. In terms of marketing, Earth Day 20 had a grassroots approach to organizing and relied largely on locally based groups like the National Toxics Campaign, a Boston-based coalition of 1,000 local groups concerned with industrial pollution. Earth Day 1990 employed strategies including focus group testing, direct mail fundraising, and email marketing.
On the first anniversary of the oil blowout, January 28, 1970, Environmental Rights Day was created, and the Declaration of Environmental Rights was read. It had been written by Rod Nash during a boat trip across the Santa Barbara Channel while carrying a copy of Thomas Jefferson's Declaration of Independence. The organizers of Environmental Rights Day, led by Marc McGinnes, had been working closely over a period of several months with Congressman Pete McCloskey (R-CA) to consult on the creation of the National Environmental Policy Act, the first of many new environmental protection laws sparked by the national outcry about the blowout/oil spill and on the Declaration of Environmental Rights. Both McCloskey (Earth Day co-chair with Senator Gaylord Nelson) and Earth Day organizer Denis Hayes, along with Senator Alan Cranston, Paul Ehrlich, David Brower and other prominent leaders, endorsed the Declaration and spoke about it at the Environmental Rights Day conference. According to Francis Sarguis, "the conference was sort of like the baptism for the movement." According to Hayes, this was the first giant crowd he spoke to that "felt passionately, I mean really passionately, about environmental issues." Hayes also thought the conference might be the beginning of a real movement. Nash, Garrett Hardin, McGinnes and others went on to develop the first undergraduate Environmental Studies program of its kind at the University of California at Santa Barbara.
John McConnell first introduced the idea of a global holiday called "Earth Day" at the 1969 UNESCO Conference on the Environment. The first Earth Day proclamation was issued by San Francisco Mayor Joseph Alioto on March 21, 1970. Celebrations were held in various cities, such as San Francisco and in Davis, California with a multi-day street party. UN Secretary-General U Thant supported McConnell's global initiative to celebrate this annual event; and on February 26, 1971, he signed a proclamation to that effect, saying:
Earth Day is an annual event on April 22 to demonstrate support for environmental protection. First held on April 22, 1970, it now includes a wide range of events coordinated globally by EARTHDAY.ORG (formerly Earth Day Network) including 1 billion people in more than 193 countries. The official theme for 2024 is "Planet vs. Plastics." 2025 will be the 55th anniversary of Earth Day.
United Nations secretary-general Kurt Waldheim observed Earth Day with similar ceremonies on the March equinox in 1972, and the United Nations Earth Day ceremony has continued each year since on the day of the March equinox (the United Nations also works with organizers of the April 22 global event). Margaret Mead added her support for the equinox Earth Day, and in 1978 declared:
The first Canadian Earth Day (French: Jour de la Terre) was held on Thursday, September 11, 1980, and was organized by Paul D. Tinari, then a graduate student in Engineering Physics/Solar Engineering at Queen's University. Flora MacDonald, then MP for Kingston and the Islands and former Canadian Secretary of State for External Affairs, officially opened Earth Day Week on September 6, 1980, with a ceremonial tree planting and encouraged MPs and MPPs across the country to declare a cross-Canada annual Earth Day. The principal activities taking place on the first Earth Day included educational lectures given by experts in various environmental fields, garbage and litter pick-up by students along city roads and highways, and tree plantings to replace the trees killed by Dutch elm disease.
Warner Bros. Records released an Earth Day-themed single in 1990 entitled "Tomorrow's World", written by Kix Brooks (who would later become one-half of Brooks & Dunn) and Pam Tillis. The song featured vocals from Lynn Anderson, Butch Baker, Shane Barmby, Billy Hill, Suzy Bogguss, Kix Brooks, T. Graham Brown, The Burch Sisters, Holly Dunn, Foster & Lloyd, Vince Gill, William Lee Golden, Highway 101, Shelby Lynne, Johnny Rodriguez, Dan Seals, Les Taylor, Pam Tillis, Mac Wiseman, and Kevin Welch. It charted at number 74 on the Hot Country Songs chart dated May 5, 1990.
As the millennium approached, Hayes agreed to spearhead another campaign, this time focusing on global warming and pushing for clean energy. The April 22 Earth Day in 2000 combined the big-picture feistiness of the first Earth Day with the international grassroots activism of Earth Day 1990. For 2000, Earth Day had the internet to help link activists around the world. By the time April 22 came around, 5,000 environmental groups worldwide were on board, reaching out to hundreds of millions of people in a record 184 countries. Events varied: A talking drum chain traveled from village to village in Gabon, Africa, for example, while hundreds of thousands of people gathered on the National Mall in Washington, D.C., US.
Google's first Earth Day doodle was in 2001.
In the U.S. in 2004, Earth Day Network and its partners focused on voter registration for Earth Day, registering hundreds of thousands of voters. Major tree planting events also took place. Other prominent U.S. Earth Day events included an annual cleanup in Dayton, Ohio and the 3rd Annual Community Based Solutions to Environmental Health & Justice Conference in Seattle, Washington.
The Global Warming in the Pulpit Pledge campaign which mobilized priests, ministers, rabbis, and other faith leaders across the U.S. and Canada to make a commitment to preach on global climate change as a moral issue was launched. Later in 2007, Live Earth, a global music event, was held across the world.
At the moment of the equinox, it is traditional to observe Earth Day by ringing the Japanese Peace Bell, which Japan donated to the United Nations. Over the years, celebrations have occurred in various places worldwide at the same time as the UN celebration. On March 20, 2008, in addition to the ceremony at the United Nations, ceremonies were held in New Zealand, and bells were sounded in California, Vienna, Paris, Lithuania, Tokyo, and many other locations. The equinox Earth Day at the UN is organized by the Earth Society Foundation.
In partnership with the Peace Corps, Earth Day Network worked with local volunteers to implement environmental and civic education programs, tree plantings, village clean-ups, and recycling seminars in rural areas in Ukraine, the Philippines, Georgia, Albania, and Kolkata, India. In 2010, Earth Day Network also established a satellite office in Kolkata, India.
The Climate Rally on the National Mall in Washington, D.C., drew in more than 150,000 activists to demand that U.S. Congress pass comprehensive climate legislation in 2010. The nine-hour event featured more than 70 high-profile speakers, including leadership from the faith, labor, civil rights, environmental communities, the private sector, leading climate scientists, celebrities, Cabinet Secretaries, international political leaders, and local government officials.
2011 Earth Day events included an environmental forum for local political leaders and the first-ever Earth Day celebration in Tunis City and primary school events throughout Iraq. In 17 of the world's most severely deforested countries, Earth Day Network completed a project to plant over 1.1 million trees. Across the globe, more than 100 million Billion Acts of Green were registered. In September 2011, at the Clinton Global Initiative, President Clinton recognized this project as an exemplary approach to addressing global challenges.
Meanwhile, stories of hope inspired communities to take action and MobilizeU, a program to educate and activate college students around Earth Day and environmental issues, expanded in 2013 to 296 universities in 51 countries on six continents and in 46 US states.
The theme for Earth Day 2016 was Trees for Earth. India, the Caribbean, Vietnam, and Morocco made substantial government commitments. The Black Lives Matter organization, which was created in 2013, also engaged with EarthDay.org in community panels. Close to 700 million community members, organizations, and school children took part in Earth Day 2016. Over 36 million trees were planted in India. "Earth Day Network" (now EarthDay.org) was accepted as an entry on Baidu Baike, a major online cyclopedia in China.
Earth Day 2018's theme, End Plastic Pollution, was dedicated to building a world of educated citizens who understand the environmental, climate, and health consequences of using plastic. Through an online Plastics Pollution Calculator, consumers calculated how much disposable plastic they used in a year and planned how to reduce this amount of waste. A Plastic Pollution Primer and Action Toolkit also educated consumers about actions to reduce their plastic footprint. Events worldwide in The Gambia, Italy, Thailand, Japan, India, the U.S., among others, included plastic cleanups, teach-ins, and festivals in which 10,000 partners participated. In April 2018, the Google search for "Plastic Pollution" saw the highest trends in the previous five years, 5.5 million pages in 17 languages were created on the internet about "Earth Day 2018" and "plastics," and global media outlets with a combined audience of 450+ million people covered the campaign. The phrase "plastic pollution" on social media in the U.S. alone reached more than 155 million people. As a result, over 23,0000+ plastic cleanups were registered on Google, 60 countries introduced single-use plastic bans and legislation, and companies such as Coca-Cola and Starbucks announced steps to eliminate and significantly reduce plastic pollution.
The Earth Day 2021 theme is Restore Our Earth and features five primary programs: The Canopy Project, Food and Environment, Climate Literacy, the Global Earth Challenge, and The Great Global CleanUp. During the week of Earth Day, earthday.org and lead organizers, Education International, Hip Hop Caucus, and Earth Uprising organized three separate parallel climate action summits on climate literacy, environmental justice, and youth-led climate-focused issues. Earthday.org also organized the second-annual Earth Day Live livestream event (April 22, 2021) featuring global activists, international leaders, and influencers.
At a meeting of the Environmental Teach-In board of directors, the finance committee chair arrived with a check for $20,000 (equivalent to $156,915 in 2023) from Standard Oil of New Jersey (now ExxonMobil). That would have provided an effective measure of financial relief for the financially strapped group. But Hayes declined the check, convincing the board that it would destroy the credibility of the nascent organization. He said that he would be delighted to accept money from clean sources, but no other corporate money was ever raised for the national organization.
Because of the non-hierarchical tenor of the times, Hayes suggested that people be designated coordinators rather than directors. He became the national coordinator, and he quickly hired various regional coordinators, a press coordinator, a K-12 coordinator, a volunteer coordinator, etc. At its peak, the national office had a few dozen paid staff, each earning a flat $375/month (equivalent to $3,116 in 2023), plus more than 100 regular volunteers.
By far the largest source of funding for the first Earth Day was organized labor. Walter Reuther had led the United Auto Workers (UAW) since 1946, and he was a progressive supporter of civil rights, opposed the war, and championed the environment. He was a founding member of the Coalition for Clean Air, which successfully lobbied for the Clean Air Act of 1970. Walter Reuther, president of the United Auto Workers, made the first donation to support the first Earth Day in the amount of $2,000 (equivalent to $15,692 in 2023). Under his leadership, the UAW also funded telephone capabilities so that the organizers could communicate and coordinate with each other from all across the United States. The UAW also financed, printed, and mailed all of the literature and other materials for the first Earth Day and mobilized its members to participate in the public demonstrations across the country. According to Denis Hayes, "The UAW was by far the largest contributor to the first Earth Day" and "Without the UAW, the first Earth Day would have likely flopped!" Hayes further said, "Walter's presence at our first press conference utterly changed the dynamics of the coverage—we had instant credibility."
In November 2023, to bring public attention to the health threat that microplastics pose, earthday.org released its report Babies vs. Plastics, which collated some of the latest science on the subject. The Guardian newspaper carried an Op Ed about the report highlighting that it is the children of the Global South who are being the most impacted by exposure to microplastics.