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Earth Hour is a worldwide movement organized by the
World Wildlife Fund The World Wide Fund for Nature Inc. (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the W ...
(WWF). The event is held annually, encouraging individuals, communities, and businesses to turn off non-essential electric lights, for one hour, from 8:00 to 9:00 p.m. on the last Saturday of March, as a symbol of commitment to the planet. It was started as a lights-off event in
Sydney Sydney ( ) is the capital city of the state of New South Wales, and the most populous city in both Australia and Oceania. Located on Australia's east coast, the metropolis surrounds Sydney Harbour and extends about towards the Blue Mounta ...
, Australia, in 2007. Occasionally, in years when Holy Saturday falls on the last Saturday of March, Earth Hour is moved a week early rather than its usual date.


History of Earth Hour


Conception and start: 2004–2007

In 2004, confronted with scientific findings, WWF Australia met with advertising agency Leo Burnett Sydney to "discuss ideas for engaging Australians on the issue of climate change". The idea of a large scale switch off was coined and developed in 2006, originally under the working title "The Big Flick". WWF Australia presented their concept to
Fairfax Media Fairfax Media was a media company in Australia and New Zealand, with investments in newspaper, magazines, radio and digital properties. The company was founded by John Fairfax as John Fairfax and Sons, who purchased '' The Sydney Morning Hera ...
who, along with Sydney Lord Mayor
Clover Moore Clover Margaret Moore (née Collins, born 22 October 1945) is an Australian politician. She has been the Lord Mayor of the City of Sydney since 2004 and is currently the longest serving Lord Mayor of Sydney since the creation of the City of Syd ...
, agreed to back the event. The 2007 Earth Hour was held on March 31 in Sydney, Australia at 7:30 pm, local time. In October 2007,
San Francisco San Francisco (; Spanish for " Saint Francis"), officially the City and County of San Francisco, is the commercial, financial, and cultural center of Northern California. The city proper is the fourth most populous in California and 17t ...
ran its own "Lights Out" program inspired by the Sydney Earth Hour. After their successful event in October, the organizers decided to rally behind the Earth Hour being planned for March 2008.


2008

Earth Hour 2008 was held internationally on March 29, 2008 from 8 p.m. to 9 p.m. local time, marking the first anniversary of the event. 35 countries around the world participated as official flagship cities and over 400 cities also supported. Landmarks around the world turned off their non-essential lighting for Earth Hour. Some websites took part in the event, with
Google Google LLC () is an American Multinational corporation, multinational technology company focusing on Search Engine, search engine technology, online advertising, cloud computing, software, computer software, quantum computing, e-commerce, ar ...
's homepage going "dark" on the day . According to a Zogby International online survey, 36 million Americans—approximately 16 percent of the United States adult population—participated in Earth Hour 2008. The survey also showed there was a 4 percentage point increase in the level of interest in environmental issues such as climate change and pollution directly after the event (73 percent pre-event versus 77 percent post-event).
Tel Aviv Tel Aviv-Yafo ( he, תֵּל־אָבִיב-יָפוֹ, translit=Tēl-ʾĀvīv-Yāfō ; ar, تَلّ أَبِيب – يَافَا, translit=Tall ʾAbīb-Yāfā, links=no), often referred to as just Tel Aviv, is the most populous city in the G ...
scheduled their Earth Hour for Thursday March 27, 2008 to avoid conflict with Sabbath.
Dublin Dublin (; , or ) is the capital and largest city of Ireland. On a bay at the mouth of the River Liffey, it is in the province of Leinster, bordered on the south by the Dublin Mountains, a part of the Wicklow Mountains range. At the 2016 ...
moved their Earth Hour to between 9 and 10 p.m. due to their northern geographical location. According to WWF Thailand,
Bangkok Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populati ...
decreased electricity usage by 73.34 megawatts, which, over one hour, is equivalent to 41.6 tonnes of
carbon dioxide Carbon dioxide ( chemical formula ) is a chemical compound made up of molecules that each have one carbon atom covalently double bonded to two oxygen atoms. It is found in the gas state at room temperature. In the air, carbon dioxide is t ...
. The ''Bangkok Post'' gave different figures of 165
megawatt-hours A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common bi ...
and 102 tonnes of carbon dioxide. This was noted to be significantly less than a similar campaign initiated by
Bangkok Bangkok, officially known in Thai as Krung Thep Maha Nakhon and colloquially as Krung Thep, is the capital and most populous city of Thailand. The city occupies in the Chao Phraya River delta in central Thailand and has an estimated populati ...
's City Hall the previous year in May, when 530 megawatt-hours were saved and 143 tonnes of
carbon dioxide emission Greenhouse gas emissions from human activities strengthen the greenhouse effect, contributing to climate change. Most is carbon dioxide from burning fossil fuels: coal, oil, and natural gas. The largest emitters include coal in China and larg ...
were cut. Philippine Electricity Market Corp. noted that power consumption dropped by about 78.63 megawatts in
Metro Manila Metropolitan Manila (often shortened as Metro Manila; fil, Kalakhang Maynila), officially the National Capital Region (NCR; fil, link=no, Pambansang Punong Rehiyon), is the capital region, seat of government and one of three List of metrop ...
, and up to 102.2 megawatts on
Luzon Luzon (; ) is the largest and most populous island in the Philippines. Located in the northern portion of the Philippines archipelago, it is the economic and political center of the nation, being home to the country's capital city, Manila, as ...
. The maximum demand drop of around 39 MW was experienced at 8:14 p.m. in Metro Manila and of around 116 MW at 8:34 p.m. in the Luzon grid.
Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
used approximately 900 megawatt-hours less electrical energy during Earth Hour. At one point,
Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anch ...
saw an 8.7% reduction in consumption as compared to a typical March Saturday night. Ireland, as a whole, had a reduction in electricity use of about 1.5% for the evening. In the three-hour period between 6:30 p.m. and 9:30 pm, there was a reduction of 50 megawatts, saving 150 megawatt-hours, or approximately 60 tonnes of carbon dioxide. In
Dubai Dubai (, ; ar, wikt:دبي, دبي, translit=Dubayy, , ) is the List of cities in the United Arab Emirates#Major cities, most populous city in the United Arab Emirates (UAE) and the capital of the Emirate of Dubai, the most populated of the 7 ...
, where external lighting on several major city landmarks was turned off and street lighting in selected areas was dimmed by 50%, the Electricity and Water Authority reported savings of 100 megawatt-hours of electricity. This represented a 2.4% reduction in demand compared to before the hour began. The best result was from
Christchurch Christchurch ( ; mi, Ōtautahi) is the largest city in the South Island of New Zealand and the seat of the Canterbury Region. Christchurch lies on the South Island's east coast, just north of Banks Peninsula on Pegasus Bay. The Avon Rive ...
, New Zealand, with the city reporting a drop of 13% in electricity demand. However, national grid operator Transpower reported that New Zealand's power consumption during Earth Hour was 335 megawatts, higher than the 328 megawatt average of the previous two Saturdays.
Melbourne Melbourne ( ; Boonwurrung/ Woiwurrung: ''Narrm'' or ''Naarm'') is the capital and most populous city of the Australian state of Victoria, and the second-most populous city in both Australia and Oceania. Its name generally refers to a metro ...
, Australia reduced demand by 10.1%. Sydney, being the city that participated in both the 2007 and 2008 Earth Hours, cut electricity consumption by 8.4%. This is less than the previous year's 10.2%; however, Earth Hour executive director Andy Ridley made the claim that after factoring margin of error, the participation in this city was the same. The worst result was from
Calgary Calgary ( ) is the largest city in the western Canadian province of Alberta and the largest metro area of the three Prairie Provinces. As of 2021, the city proper had a population of 1,306,784 and a metropolitan population of 1,481,806, maki ...
, Canada. The city's power consumption actually went up 3.6% at the hour's peak electricity demand. Calgary's weather plays a large role in power consumption, and the city experienced weather 12 °C (around 22 °F) colder than the previous Saturday's recorded temperature in the inaugural year. Enmax, the city's power supplier, has confirmed that in all subsequent years, Calgarians have not supported the Earth Hour initiative, noting that power consumption changed only marginally during the hour in 2010 and 2011 (1% or less) and in 2012 and 2013 showed no appreciable change in power usage at all.


2009

Earth Hour 2009 was from 8:30 p.m. to 9:30 p.m. local time, March 28, 2009. The campaign was titled "Vote Earth" and was dubbed "the world's first global vote" with one billion votes was the stated aim for Earth Hour 2009, in the context of the pivotal 2009 United Nations Climate Change Conference. WWF reported that 88 countries and 4,159 cities participated in Earth Hour 2009, ten times more cities than Earth Hour 2008 had (2008 saw 400 cities participate). Among the participants in 2009 was, for the first time, the United Nations Headquarters in New York City. In Egypt, the lights went out on the Sphinx and the Great Pyramids of Giza from 8:30 to 9:30 pm. The
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
saw participation from 647 cities and towns; over 10 million Filipinos were estimated to have joined in the hour-long lights-off. This was followed by Greece with 484 cities and towns participating, and Australia with 309. Despite official organizers WWF stating that the event is not about the reduction in electricity, a number of public institutions reported on electricity savings in their cities to see participation numbers. The Canadian province of
Ontario Ontario ( ; ) is one of the thirteen provinces and territories of Canada.Ontario is located in the geographic eastern half of Canada, but it has historically and politically been considered to be part of Central Canada. Located in Central Ca ...
, excluding the city of
Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anch ...
, saw a decrease of 6% in electricity usage while
Toronto Toronto ( ; or ) is the capital city of the Canadian province of Ontario. With a recorded population of 2,794,356 in 2021, it is the most populous city in Canada and the fourth most populous city in North America. The city is the anch ...
saw a decrease of 15.1% (nearly doubled from 8.7% the previous year) as many businesses darkened, including the landmark CN Tower. The
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
was able to save 611 MWh of electricity during the time period, which is said to be equivalent to shutting down a dozen coal-fired power plants for an hour. Swedish electricity operator
Svenska Kraftnät Svenska kraftnät is an electricity transmission system operator in Sweden. It is a state-owned public utility, which was created in 1992 by splitting the former government agency Vattenfall into a power generation and distribution company Vatte ...
recorded a 2.1% decrease in power consumption from its projected figure between 8 p.m. and 9 pm. The following hour, the corresponding number was 5%. This is equivalent to the consumption of approximately half a million households out of the total 4.5 million households in Sweden. According to the National Power Dispatch Centre,
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making ...
's electricity demand fell 140
MWh A kilowatt-hour (unit symbol: kW⋅h or kW h; commonly written as kWh) is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ). Kilowatt-hours are a common bill ...
during Earth Hour.


2010

Earth Hour 2010 was held from 8:30 p.m. to 9:30 p.m. local time on March 27. In Israel, the hour was held on April 22. 126 countries participated in Earth Hour 2010. In the United States polling showed that an estimated 90,000,000 Americans participated in Earth Hour as lights were turned off around the country, including landmarks such as Mount Rushmore, the
Las Vegas Strip The Las Vegas Strip is a stretch of Las Vegas Boulevard South in Clark County, Nevada, that is known for its concentration of resort hotels and casinos. The Strip, as it is known, is about long, and is immediately south of the Las Vegas cit ...
, the
Empire State Building The Empire State Building is a 102-story Art Deco skyscraper in Midtown Manhattan, New York City. The building was designed by Shreve, Lamb & Harmon and built from 1930 to 1931. Its name is derived from " Empire State", the nickname of the ...
and
Niagara Falls Niagara Falls () is a group of three waterfalls at the southern end of Niagara Gorge, spanning the Canada–United States border, border between the Provinces and territories of Canada, province of Ontario in Canada and the U.S. state, state ...
. Some cities and landmarks took the opportunity to make more long-term adjustments to their everyday power consumption. In
Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = List of sovereign states, Count ...
, the Building Owners and Managers Association (BOMA) developed lighting guidelines to reduce light pollution and reduce the carbon footprint of downtown buildings. Mount Rushmore in
South Dakota South Dakota (; Sioux: , ) is a U.S. state in the North Central region of the United States. It is also part of the Great Plains. South Dakota is named after the Lakota and Dakota Sioux Native American tribes, who comprise a large po ...
started powering down each night around 9 p.m. instead of 11 p.m. In
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making ...
, electricity demand fell 500,000 kWh during Earth Hour 2010, which was three times larger than the first time the country joined the event in 2009. In the
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
, 1,067 towns and cities pledged participation in 2010 and over 15 million Filipinos participated in the event. About 4000 cities participated, including landmarks such as Big Ben, the
Empire State Building The Empire State Building is a 102-story Art Deco skyscraper in Midtown Manhattan, New York City. The building was designed by Shreve, Lamb & Harmon and built from 1930 to 1931. Its name is derived from " Empire State", the nickname of the ...
, the
Sydney Opera House The Sydney Opera House is a multi-venue performing arts centre in Sydney. Located on the foreshore of Sydney Harbour, it is widely regarded as one of the world's most famous and distinctive buildings and a masterpiece of 20th-century architec ...
, the
Eiffel Tower The Eiffel Tower ( ; french: links=yes, tour Eiffel ) is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It is named after the engineer Gustave Eiffel, whose company designed and built the tower. Locally nicknamed ...
, the Parthenon, the
Brandenburg Gate The Brandenburg Gate (german: Brandenburger Tor ) is an 18th-century Neoclassical architecture, neoclassical monument in Berlin, built on the orders of Prussian king Frederick William II of Prussia, Frederick William II after Prussian invasion ...
, and the
Forbidden City The Forbidden City () is a palace complex in Dongcheng District, Beijing, China, at the center of the Imperial City of Beijing. It is surrounded by numerous opulent imperial gardens and temples including the Zhongshan Park, the sacrifi ...
.


2011

Earth Hour 2011 was the biggest year in the campaign's five-year history, reaffirming it as the largest ever voluntary action for the environment. In 2011, the tagline "Beyond the Hour" was adopted by organizers as a way to encourage people to take their commitment to the cause beyond the 60-minute event. Together with agency Leo Burnett, Earth Hour unveiled an updated planet themed logo that included a small plus symbol to the right of the signature "60" which was used in previous years. The 60+ symbol continues to be the main logo used by campaign organizers around the world. Earth Hour 2011 took place in a record 5,251 cities and towns in 135 countries and territories on all seven continents. It had an estimated reach of 1.8 billion people across the globe. In addition to this, the campaign's digital footprint grew to 91 million. In
India India, officially the Republic of India (Hindi: ), is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area, the List of countries and dependencies by population, second-most populous ...
, Earth Hour 2011 was held on March 26, 2011 from 8:30 p.m. to 9:30 pm. IST, flagged off by the
Chief Minister of Delhi The chief minister of the National Capital Territory of Delhi is the head of government of the National Capital Territory of Delhi. According to the Constitution of India, the lieutenant governor is the National Capital Territory of Delhi's ' ...
Sheila Dikshit Sheila Dikshit () (née Kapoor; 31 March 1938 – 20 July 2019) was an Indian politician. The longest-serving Chief Minister of Delhi, as well as the longest-serving female chief minister of any Indian state, she served for a period of 15 yea ...
and Earth Hour 2011 Ambassador and Bollywood actress Vidya Balan in the presence of Jim Leape, Director General, WWF International. Rosebowl channel suspended broadcasting from 8.30 p.m. to 9.30 p.m. to mark the observance of Earth Hour. In Azerbaijan, Maiden Tower darkened for Earth Hour. The
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
, which has been an active participant of the Earth Hour, had an early "earth hour" when power was accidentally interrupted, plunging Metro Manila and nearby provinces into darkness. After power was restored, major buildings, commercial centers and residential areas in Metro Manila and most provinces continued to turn off their lights, while participating channels in the Philippines, ABS-CBN and Cartoon Network halted their transmissions for an hour. 30 provinces and cities in Vietnam took part in Earth Hour 2011 with the main event held in Nha Trang. The nation's electricity demand fell 400,000 kWh, one-fifth less than the previous year's. Vietnam managed to save 500 million VND (US$23,809) thanks to the saved power. YouTube promoted the Earth Hour by changing its logo, and by adding a switch on/off feature near the title of each video, so that users could change the background colour from white to black. One of the least co-operative areas traditionally has been
Alberta Alberta ( ) is one of the thirteen provinces and territories of Canada. It is part of Western Canada and is one of the three prairie provinces. Alberta is bordered by British Columbia to the west, Saskatchewan to the east, the Northwest T ...
; in 2008, Calgary's power consumption went up during Earth Hour. The trend continued in 2011 when
Edmonton Edmonton ( ) is the capital city of the Canadian province of Alberta. Edmonton is situated on the North Saskatchewan River and is the centre of the Edmonton Metropolitan Region, which is surrounded by Alberta's central region. The city an ...
's power usage also increased. While
Calgary Calgary ( ) is the largest city in the western Canadian province of Alberta and the largest metro area of the three Prairie Provinces. As of 2021, the city proper had a population of 1,306,784 and a metropolitan population of 1,481,806, maki ...
's power usage went down in 2011 during the event, electricity officials could not distinguish their readings between normal usage and a conscious attempt to participate.


2012

Earth Hour Global headquarters was moving from Sydney to Singapore in February 2012. A launch event took place at ION Orchard on February 20, with the move supported by Singapore's Economic Development Board (EDB) and WWF-Singapore. Earth Hour 2012 was observed on March 31, 2012, from 8:30 p.m. to 9:30 p.m. (participants' local time). It took place in more than 7000 cities and towns across 152 countries and territories, making it the biggest growth year for the campaign since 2009. It was also the first year that Earth Hour was celebrated in space, with Dutch astronaut
André Kuipers André Kuipers (; born 5 October 1958) is a Dutch physician and ESA astronaut. He became the second Dutch citizen, third Dutch-born and fifth Dutch-speaking astronaut upon launch of Soyuz TMA-4 on 19 April 2004. Kuipers returned to Earth a ...
tweeting at various moments during the event's trek around the globe.


2013

Earth Hour 2013 was held across the world on Saturday, March 23 at 8:30 p.m. to 9:30 p.m. local time to avoid taking place after
European Summer Time Summer time in Europe is the variation of standard clock time that is applied in most European countries (apart from Iceland, Belarus, Turkey and Russia) in the period between spring and autumn, during which clocks are advanced by one hour from th ...
began, ensuring a greater impact for the lights-off event. It was also changed to avoid coinciding with the Christian Holy Saturday, which fell on March 30 of that year.


Africa

In 2013, the world's first Earth Hour Forest began in Uganda, an ongoing project that aims to restore 2700 hectares of degraded land. Standard Chartered Bank-Uganda pledged to help fill the forest with more than 250,000 trees. Earth Hour commemorations in Madagascar had as their highlight the distribution of one thousand wood-saving stoves to victims of the cyclone Haruna in the southern town of Toliara, extensively damaged in the February 22 storm. WWF-Madagascar and ADES (Association pour le Développement de l'Energie Solaire) distributed an additional 2,200 wood-saving stoves later that year. Former President of
Botswana Botswana (, ), officially the Republic of Botswana ( tn, Lefatshe la Botswana, label= Setswana, ), is a landlocked country in Southern Africa. Botswana is topographically flat, with approximately 70 percent of its territory being the Kal ...
, Festus Mogae promised to plant one million indigenous trees over four years, as part of his "I Will If You Will" challenge for Earth 2013.


Europe

WWF-Russia launched its 2013 campaign aiming to secure more than 100,000 signatures from Russian citizens to petition for amendments to the current forest legislation. The petition reached more than 127,000 signatures before the Earth Hour event, ensuring the legislation was debated in the State Duma by politicians.


2014

Earth Hour 2014 took place on Saturday, March 29, during the same 8:30 to 9:30 p.m. local timeslot. Earth Hour Blue was launched as a global crowdfunding and crowdsourcing platform for the planet. "It is all about the collective effort of individuals around the world getting together to help fund or add their voice to support on-the-ground environmental and social projects that deliver real outcomes." The Earth Hour 2014 Report highlighted a broad range of environmental outcomes achieved by the movement across 162 countries and territories around the world. More than US$60,000 was raised on the Earth Hour Blue platform for grassroots environmental projects run by WWF. The movement also saw campaigns to help protect Australia's Great Barrier Reef, the launch of a Blue Sky App in China, and the delivery of thousands of wood efficient stoves to communities in Madagascar.


2015

Earth Hour 2015 took place on Saturday, March 28, again between 8:30 and 9:30 p.m. local time.Celebrating Earth Hour
Earth Hour/WWF Website
The tagline for the global campaign was "Change Climate Change", returning to the movement's original focus to initiate citizen action on global warming. A day before the event, over 170 countries and territories had confirmed their participation; with more than 1200 landmarks and close to 40 UNESCO world heritage sites set for the switch off. For the second year running, Earth Hour Blue aims to raise funds for WWF organized climate focused projects on a crowdfunding platform. This year, crowdfunding projects include solar light distribution in the Philippines and India, and wildlife based projects from Colombia, Uganda and Indonesia. Uniquely participating in the Earth Hour activity are the inhabitants of an island called
Sibuyan Sibuyan is a crescent-shaped island, the second largest in an archipelago comprising Romblon Province, Philippines. Located in the namesake Sibuyan Sea, it has an area of and has a total population of 62,815 as of 2020 census. The island has ...
in the Philippines who turned on their lights to elevate the message of using renewable energy. The island's source of electricity is a mini-hydro power plant.


2016

Earth Hour 2016 was on Saturday, March 19, from 8:30 p.m. to 9:30 p.m. during participants' local time. It was also changed to avoid coinciding with the Christian Holy Saturday, which fell on March 26 of that year. It was the 10th anniversary of the campaign's beginnings in Sydney, Australia. Östersund in Sweden cancelled the 2016 event, following a spate of sex attacks, highlighting safety as a subject for discussion when saving resources. Almost all the countries in the world observed Earth Hour.


2017

Earth Hour occurred on Saturday, March 25 from 8:30 pm to 9:30 pm.


2018

Earth Hour 2018 took place on March 24, from 8:30 p.m. to 9:30 p.m. in participants' time, in order to avoid coinciding with Christian Holy Saturday which fell on March 31.


2019

Earth Hour 2019 was held on March 30, from 8:30 p.m. to 9:30 pm. A total of 188 countries participated in Earth Hour 2019.
Miss Earth 2018 Miss Earth 2018, the 18th edition of the Miss Earth pageant, with the theme "Goddesses of the Earth", was held on November 3, 2018, at the Mall of Asia Arena in Pasay, Metro Manila, Philippines. Karen Ibasco of the Philippines crowned her succes ...
Nguyễn Phương Khánh from
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making ...
was designated as the Earth Hour Ambassador to implement several environmental protection activities. As ambassador, Phuong Khanh urged everyone to voluntarily turn off unnecessary lights and equipment for an hour, contributing to spreading the message "Save Energy, Save Earth - Energy saving, Earth protection".


2020

Earth Hour 2020 took place on Saturday, 28 March from 8:30 pm to 9:30 pm local time and it went digitally due to the
COVID-19 pandemic The COVID-19 pandemic, also known as the coronavirus pandemic, is an ongoing global pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). The novel virus was first identi ...
. 190 countries and territories came together to support this movement and few of the many public personalities such as UN Secretary General
António Guterres António Manuel de Oliveira Guterres ( , ; born 30 April 1949) is a Portuguese politician and diplomat. Since 2017, he has served as secretary-general of the United Nations, the ninth person to hold this title. A member of the Portuguese Soci ...
,
Pope Francis Pope Francis ( la, Franciscus; it, Francesco; es, link=, Francisco; born Jorge Mario Bergoglio, 17 December 1936) is the head of the Catholic Church. He has been the bishop of Rome and sovereign of the Vatican City State since 13 March 2013 ...
, environmental activist
Greta Thunberg Greta Tintin Eleonora Ernman Thunberg (; born 3 January 2003) is a Swedish environmental activist who is known for challenging world leaders to take immediate action for climate change mitigation. Thunberg's activism began when she persuaded ...
, Canadian Prime Minister
Justin Trudeau Justin Pierre James Trudeau ( , ; born December 25, 1971) is a Canadian politician who is the 23rd and current prime minister of Canada. He has served as the prime minister of Canada since 2015 and as the leader of the Liberal Party since ...
, Indian film star
Amitabh Bachchan Amitabh Bachchan (; born as Amitabh Shrivastav; 11 October 1942) is an Indian actor, film producer, television host, occasional playback singer and former politician known for his work in Hindi cinema. He is regarded as one of the most succe ...
, UN Environment Goodwill ambassador
Dia Mirza Dia Mirza Rekhi (born Dia Handrich; 9 December 1981) is an Indian model, actress, producer, and social worker who predominantly works in Hindi films. Mirza won the title of Miss Asia Pacific International in 2000 after being crowned Femina Mis ...
, Kenyan singing sensation
Nikita Kering Nikita Chepchumba Kering', popularly known as Nikita Kering', is a Kenyan musician, actress and media personality. Early life and education She was born on February 26, 2002, in Nairobi, Kenya. She attended Riara Springs Academy, Kilimani Juni ...
, Colombian model Claudia Bahamon and British Singer Songwriter, Cat Stevens also participated in Earth Hour 2020.


2021

Earth Hour 2021 took place on Saturday, 27 March from 8:30 pm to 9:30 pm local time.


2022

Earth Hour 2022 took place on Saturday, 26 March from 8:30 pm to 9:30 pm local time.


Measurement of reduction in electricity use

The Earth Hour Global FAQ page states: A 2014 study published in ''Energy Research and Social Science'' compiled 274 measurements of observed changes in electricity demand caused by Earth Hour in 10 countries, spanning 6 years, and found that the events reduced electricity consumption an average of 4%. The study noted the policy challenge of converting Earth Hour's short-term energy saving into longer-term actions, including sustained changes in behaviour and investment.


Criticism

Bjørn Lomborg, author of '' The Skeptical Environmentalist'', wrote, "It is vital to make solar and other new technology cheaper than fossil fuels quickly so we can turn off carbon energy sources for a lot longer than one hour and keep the planet running... Fossil fuels literally gave us an enlightenment, by lighting our world and giving us protection from the fury of the elements. It is ironic that today's pure symbolism should hark back to a darker age." Lomborg also pointed out the feel-good factor Earth Hour creates, noting that it is an "ineffective feel good event" that makes people feel they are doing something for the environment, while in reality the amount of carbon emissions reduced by the earth hour is negligible. Other criticisms of Earth Hour have included the following: * Some critics point out that the reduction in power consumption during Earth Hour itself is relatively insignificant. '' The Herald Sun'' equated the power savings in the Sydney central business district to "taking 48,613 cars off the road for 1 hour". Australian columnist
Andrew Bolt Andrew Bolt (born 26 September 1959) is an Australian right-wing social and political commentator. He has worked at the News Corp-owned newspaper company The Herald and Weekly Times (HWT) for many years, for both '' The Herald'' and its succ ...
pointed out that "A cut so tiny is trivial – equal to taking six cars off the road for a year". *Other environmentalists have criticized Earth Hour's focus on individual behaviour, when a small number of fossil fuel companies have emitted the vast majority of man-made carbon emissions.
Adam McGibbon Adam McGibbon is a Northern Irish mentalist and writer. Early life and education McGibbon was born in Belfast in 1988 and attended Lagan College, Northern Ireland’s first integrated school, and Queen’s University Belfast. At university, he ...
, writing for ''
The Independent ''The Independent'' is a British online newspaper. It was established in 1986 as a national morning printed paper. Nicknamed the ''Indy'', it began as a broadsheet and changed to tabloid format in 2003. The last printed edition was publish ...
'', criticized Earth Hour for releasing fossil fuel companies and politicians from their responsibility to deal with climate change. * ''
The Christian Science Monitor ''The Christian Science Monitor'' (''CSM''), commonly known as ''The Monitor'', is a nonprofit news organization that publishes daily articles in electronic format as well as a weekly print edition. It was founded in 1908 as a daily newspaper ...
'' said that most candles are made from paraffin, a heavy
hydrocarbon In organic chemistry, a hydrocarbon is an organic compound consisting entirely of hydrogen and carbon. Hydrocarbons are examples of group 14 hydrides. Hydrocarbons are generally colourless and hydrophobic, and their odors are usually weak or ...
derived from
crude oil Petroleum, also known as crude oil, or simply oil, is a naturally occurring yellowish-black liquid mixture of mainly hydrocarbons, and is found in geological formations. The name ''petroleum'' covers both naturally occurring unprocessed crude ...
, a
fossil fuel A fossil fuel is a hydrocarbon-containing material formed naturally in the Earth's crust from the remains of dead plants and animals that is extracted and burned as a fuel. The main fossil fuels are coal, oil, and natural gas. Fossil fuels ma ...
, and that depending on how many candles a person burns (if one uses candles during Earth Hour), whether or not they normally use
compact fluorescent light A compact fluorescent lamp (CFL), also called compact fluorescent light, energy-saving light and compact fluorescent tube, is a fluorescent lamp designed to replace an incandescent light bulb; some types fit into light fixtures designed for inca ...
bulbs, and what source of energy is used to produce their electricity, in some cases, replacing light bulbs with candles will cause an increase, instead of a decrease, in carbon dioxide emissions. * The spike in demand for electricity at the end of Earth Hour puts strain on the electrical grid, and causes an increase in carbon dioxide emissions. * On March 29, 2009, one day after Earth Hour 2009, ''Dân Trí Daily News'' published an editorial expressing concern that many young people chose to drive around the darkened city of
Hanoi Hanoi or Ha Noi ( or ; vi, Hà Nội ) is the capital and second-largest city of Vietnam. It covers an area of . It consists of 12 urban districts, one district-leveled town and 17 rural districts. Located within the Red River Delta, Hanoi i ...
for fun, exhausting petroleum instead of electricity and resulting in long traffic jams. * George Marshall of the Climate Outreach Information Network criticized Earth Hour for "playing into the hands of (the critics of environmentalists)," as darkness is symbolic of fear and decay. "The overwhelming need at the moment is to inspire ordinary people with a vision of a better world, to make them feel that action on climate change is utterly desirable and positive.... the cultural resonance (of Earth Hour) couldn't be any worse." * The Competitive Enterprise Institute has introduced an opposing ''Human Achievement Hour'' in celebration of human progress in various fields of industry, including technology, medicine, energy, and more. During this hour, the Institute suggests that people celebrate by using modern technology such as electricity, telecommunications and indoor plumbing. * In 2009, economist
Ross McKitrick Ross McKitrick (born 1965) is a Canadian economist specializing in environmental economics and policy analysis. He is a professor of economics at the University of Guelph, and a senior fellow of the Fraser Institute. McKitrick has authored wor ...
criticized the idea, saying, "Abundant, cheap electricity has been the greatest source of human liberation in the 20th century. ..The whole mentality around Earth Hour demonizes electricity." * In March 2010, ''The Daily Telegraph'' quoted Ross Hayman, head of media relations at the UK National Grid, as saying "it could therefore result in an increase in carbon emissions" due to complications related to rapidly lowering then raising electricity generation. * In February 2010, Rick Giles, president of
ACT on Campus Young ACT, formerly known as Prebble's Rebels, ACTivists and ACT on Campus, is a youth group affiliated with ACT New Zealand, a classical-liberal political party in New Zealand. It has supported the party for over two decades though has disagre ...
, the youth wing of New Zealand's
ACT Party ACT New Zealand, known simply as ACT (), is a Right-wing politics, right-wing, Classical liberalism, classical-liberal List of political parties in New Zealand, political party in New Zealand. According to former party leader Rodney Hide, ACT's ...
, appeared on the morning television show '' Sunrise'' to denounce Earth Hour and instead suggested the celebration of "Edison Hour". He argued that Earth Hour is an "anti-technology" cause, and that people will simply use candles instead, which is undesirable as they are petroleum-based. He argued that if we are heading for some kind of disaster, it makes sense to use technology to combat this. Rick said "I think my argument is so powerful that it's not necessary to talk about it". * The Ayn Rand Institute wrote, "Participants spend an enjoyable sixty minutes in the dark, safe in the knowledge that the life-saving benefits of industrial civilization are just a light switch away... Forget one measly hour with just the lights off. How about Earth Month... Try spending a month shivering in the dark without heating, electricity, refrigeration; without power plants or generators; without any of the labor-saving, time-saving, and therefore life-saving products that industrial energy makes possible." * Expressing sarcastic support for Earth Hour, the pro-carbon Carbon Sense Coalition wants Earth Hour to be renamed "Blackout Night", and to be held outside on the shortest and coldest day of the year "...to prepare our population for the dark days ahead". * During the 2010 Earth Hour in the city of Uusikaupunki in Finland, a 17-year-old female motorcyclist hit a 71-year-old man, who was walking on the street instead of the sidewalk for an unknown reason. The man died from his injuries, while the motorcyclist and her passenger were uninjured. At the time of the accident the street lights had been turned off as part of the Earth Hour. The police stated that the lack of street lighting may have played a part in the accident, while the mayor believed the city's street lights would have been too dim to prevent it even if they had been on. * Jeremy Clarkson, ex-host of the BBC motoring programme '' Top Gear'', claimed switching on all electrical items in his home as a protest against the perceived impact of Earth Hour, claiming the event would have little to no effect on attitudes towards climate change.


See also

*
88888 Lights Out 88888 Lights Out was a campaign with the stated goal of increasing awareness of global warming and promoting actions to reduce energy consumption. By encouraging India's residents to turn out the lights for eight minutes and to become more aware o ...
* Denmark plants trees * Earth Anthem * Earth Day * Earth Strike * FLICK OFF * International Dark Sky Week *
Light pollution Light pollution is the presence of unwanted, inappropriate, or excessive use of artificial lighting. In a descriptive sense, the term ''light pollution'' refers to the effects of any poorly implemented lighting, during the day or night. Light po ...
* Planet Relief


References


External links

*
Earth Hour
{{Authority control Climate change and society Annual events Recurring events established in 2007 World Wide Fund for Nature Energy conservation Environmental protection March observances