Earth Hour - wikipedia Earth Hour Earth Hour Date 24 March 2018, from 8 : 30 pm to 9 : 30 pm. Earth Hour is a worldwide movement organized by the World Wide Fund for Nature ( WWF ). The event is held annually encouraging individuals, communities, and businesses to turn off non-essential electric lights for one hour, from 8 : 30 to 9 : 30 pm on a specific day towards the end of March, as a symbol of commitment to the planet. It was started as a lights - off event in Sydney, Australia, in 2007. Since then, it has grown to engage more than 7,000 cities and towns across 187 countries and territories. Occasionally, in years when Holy Saturday falls on the last Saturday of March, Earth Hour is moved a week early rather than its traditional date. Earth Hour 2018 was on March 24, from 8 : 30 pm to 9 : 30 pm. Earth Hour 2019 is scheduled for March 30, from 8 : 30 pm to 9 : 30 pm. Contents 1 History 1.1 Conception and start : 2004 -- 2007 1.2 2008 1.3 2009 1.3. 1 Participation 1.3. 2 Participating television and radio stations 1.4 2010 1.4. 1 Participating TV channels and radio stations 1.5 2011 1.6 2012 1.7 2013 1.7. 1 Africa 1.7. 2 Europe 1.8 2014 1.9 2015 1.10 2016 1.11 2017 1.12 2018 1.13 2019 2 Organizations that support Earth Hour 3 Measurement of reduction in electricity use 4 Criticism 5 See also 6 References 7 External links History 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 who, along with Sydney Lord Mayor Clover Moore, 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 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 Overview of Sydney during Earth Hour 2008 Wikinews has related news : Businesses and individuals worldwide turn lights off as part of Earth Hour 2008 Earth Hour 2008 was held internationally on March 29, 2008 from 8 pm to 9 pm 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 '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 ). Sydney Harbour Bridge and Sydney Opera House were darkened during Earth Hour 2007. Tel Aviv scheduled their Earth Hour for Thursday March 27, 2008 to avoid conflict with Sabbath. Dublin moved their Earth Hour to between 9 and 10 pm due to their northern geographical location. Azrieli Center in Tel Aviv darkened for Earth Hour 2010. Colosseum darkened for Earth Hour 2008 Auditorio de Tenerife darkened for Earth Hour According to WWF Thailand, Bangkok decreased electricity usage by 73.34 megawatts, which, over one hour, is equivalent to 41.6 tonnes of carbon dioxide. The Bangkok Post gave different figures of 165 megawatt - hours and 102 tonnes of carbon dioxide. This was noted to be significantly less than a similar campaign initiated by Bangkok 's City Hall the previous year in May, when 530 megawatt - hours were saved and 143 tonnes of carbon dioxide emission were cut. Philippine Electricity Market Corp. noted that power consumption dropped by about 78.63 megawatts in Metro Manila, and up to 102.2 megawatts on Luzon. The maximum demand drop of around 39 MW was experienced at 8 : 14 pm in Metro Manila and of around 116 MW at 8 : 34 pm in the Luzon grid. Ontario used approximately 900 megawatt - hours less electrical energy during Earth Hour. At one point, Toronto 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 pm and 9 : 30 pm, there was a reduction of 50 megawatts, saving 150 megawatt - hours, or approximately 60 tonnes of carbon dioxide. Golden Gate Bridge and Marin Headlands public open space in the background, before ( inset ) and during Earth Hour 2008 In Dubai, 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 Sky Tower in Auckland, New Zealand, switched off its usual floodlighting during the Earth Hour, and re-lit afterwards. ( the red lights in the middle image are aircraft warning lights ) The best result was from Christchurch, 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, 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, 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 Wikinews has related news : Businesses and individuals worldwide to turn lights off as part of Earth Hour 2009 Earth Hour 2009 was from 8 : 30 pm to 9 : 30 pm 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 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, excluding the city of Toronto, saw a decrease of 6 % in electricity usage while Toronto 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 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 recorded a 2.1 % decrease in power consumption from its projected figure between 8 pm 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 Vietnam Electricity Company, Vietnam 's electricity demand fell 140 MWh during Earth Hour. Participation 96 countries and territories on 6 continents participated in the event in 2009. Participating television and radio stations The National Geographic Channel suspended regular programming for an hour and showed how to reduce energy consumption during Earth Hour. National Geographic Channel Asia suspended broadcast on March 28, 2009 from 8 : 30 pm to 9 : 30 pm. Cartoon Network and Magic 105.4 FM broadcast Earth Hour at 20 : 30 for the event. Malaysia 's 8TV halted transmission for one hour starting from 20 : 30 DhiTV and Villa TV halted transmission for one hour in Maldives from 20 : 30. Canal 5 in Mexico halted transmission for one hour in Mexico City at 20 : 30. Philippine network ABS - CBN turned off the lights in their studio from 20 : 30 to 21 : 30. Naga City internet radio stations Zone105 and XFM Naga went offline at 20 : 30. Radiotelevisión Española ( RTVE ) turned off the lights in their newsrooms and their sets. The metal structure of the greenhouses of the curitiban Botanic Garden ( Curitiba, Paraná, Southern Brazil ), with its lights off on March 27, 2010 A picture of 1600 pandas ( made in Thailand by the World Wide Fund for Nature ) exposed in Boulogne - Billancourt ( France ) on the occasion of Earth Hour Earth Hour 2010 was held from 8 : 30 pm to 9 : 30 pm 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 Empire State Building and Niagara Falls. Some cities and landmarks took the opportunity to make more long - term adjustments to their everyday power consumption. In Chicago, 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 started powering down each night around 9 pm instead of 11 pm. In Vietnam, 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, 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 Sydney Opera House, the Eiffel Tower, the Parthenon, the Brandenburg Gate, and the Forbidden City. Participating TV channels and radio stations National Geographic Channel Asia and Cartoon Network both suspended broadcasting from 8 : 30 pm to 9 : 30 pm In the Philippines, GMA Network turned off lights in their building from 8 : 30 pm to 9 : 30 pm, while ABS - CBN stopped broadcasting and turned off their lights. Vietnam 's FBNC channel joined hands with Earth Hour Vietnam. The Agenda with Steve Paikin on TVOntario ran its full program running only on candlelight again. 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, Earth Hour 2011 was held on March 26, 2011 from 8 : 30 pm to 9 : 30 pm. IST, flagged off by the Chief Minister of Delhi Sheila Dikshit 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 pm to 9.30 pm to mark the observance of Earth Hour. In Azerbaijan, Maiden Tower darkened for Earth Hour. The Philippines, 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 ; in 2008, Calgary 's power consumption went up during Earth Hour. The trend continued in 2011 when Edmonton 's power usage also increased. While Calgary '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 pm to 9 : 30 pm ( 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 tweeting at various moments during the event 's trek around the globe. 2013 Italy, Verona, Arena with backlight on on square Bra, in the bottom Town Hall before Earth Hour 2013 Italy, Verona, Arena with backlight off on square Bra, in the bottom Town Hall during Earth Hour 2013 Earth Hour 2013 was held across the world on Saturday, March 23 at 8 : 30 pm to 9 : 30 pm local time to avoid taking place after European Summer Time 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 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, 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 pm 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 pm local time. 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 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 pm to 9 : 30 pm 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 year 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. 2018 Earth Hour 2018 took place on March 24, from 8 : 30 pm to 9 : 30 pm in participants ' time, in order to avoid coinciding with Catholic Holy Saturday which fell on March 31. 2019 Earth Hour 2019 is scheduled for March 30, from 8 : 30 pm to 9 : 30 pm. Organizations that support Earth Hour Earth Hour is supported around the world by UNESCO, the UN Environment Programme, the International Trade Union Confederation, Woodland, CBRE Group, the National Hockey League, FIFA, UEFA, Hilton Worldwide, Girl Scouts of the US, World Organization of the Scout Movement, HSBC, World Association of the Girl Guides and Girl Scouts, Philips, IKEA, The Body Shop, ING Vysya Bank, and more. Measurement of reduction in electricity use The Earth Hour Global FAQ page states : Earth Hour does not purport to be an energy / carbon reduction exercise, it is a symbolic action. Therefore, we do not engage in the measurement of energy / carbon reduction levels for the hour itself. Earth Hour is an initiative to encourage individuals, businesses and governments around the world to take accountability for their ecological footprint and engage in dialogue and resource exchange that provides real solutions to our environmental challenges. Participation in Earth Hour symbolizes a commitment to change beyond the hour. 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 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, writing for The Independent, criticized Earth Hour for releasing fossil fuel companies and politicians from their responsibility to deal with climate change. The Christian Science Monitor said that most candles are made from paraffin, a heavy hydrocarbon derived from crude oil, a fossil fuel, 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 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. 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 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 ) could n'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 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, the youth wing of New Zealand 's ACT Party, 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. 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Archived from the original on September 15, 2013. Retrieved 2013 - 09 - 30. Jump up ^ `` Botswana To Plant One Million Trees To Restore Forests ''. Earth Hour. Archived from the original on September 19, 2013. Retrieved 2013 - 09 - 30. Jump up ^ `` WWF -- Earth Hour Seeks Law Reform For Protective Forests in Russia ''. panda.org. Retrieved May 31, 2015. Jump up ^ `` Earth Hour Targets 2014 to be the Crowdfunding Center For Innovation and Creativity for the Planet ''. crowdfundinsider.com. Retrieved May 31, 2015. Jump up ^ `` Earth Hour Blue : mobilising crowdfunding to support conservation and sustainable development ''. Green Africa Directory. Retrieved May 31, 2015. Jump up ^ `` 2014 Report ''. Earth Hour. Archived from the original on May 24, 2015. Retrieved May 31, 2015. Jump up ^ Celebrating Earth Hour Earth Hour / WWF Website Jump up ^ `` Earth Hour to illuminate climate ''. skynews.com.au. March 25, 2015. Archived from the original on May 3, 2015. Retrieved May 31, 2015. Jump up ^ `` Earth Hour 2015 : Why is the world turning off its lights ? ''. International Business Times UK. Retrieved May 31, 2015. Jump up ^ `` Palace encourages Pinoys to join Earth Hour 2015 on March 28 ''. GMA News Online. Retrieved May 31, 2015. Jump up ^ `` WWF - India will run Earth Hour campaign to help Sundarbans village ''. dna. Retrieved May 31, 2015. Jump up ^ Let Sea Turtles Off the Hook -- Earth Hour 2015. YouTube. March 7, 2015. Retrieved May 31, 2015. Jump up ^ `` # SOSSebangau : Seruan Aksi Peduli Kebakaran Hutan Kalimantan ''. WWF Indonesia ( in Indonesian ). Retrieved May 31, 2015. Jump up ^ `` PH island switches on lights during Earth Hour ''. Rappler. Retrieved March 20, 2016. Jump up ^ `` Earth Hour ( @ earthhour ) Twitter ''. twitter.com. Retrieved 2018 - 03 - 29. Jump up ^ `` World Heritage sites participate in Earth Hour ''. UNESCO World Heritage Centre. March 28, 2012. Retrieved 2015 - 10 - 05. Jump up ^ `` Earth Hour -- International Trade Union Confederation ''. ITUC. March 12, 2012. Retrieved 2015 - 10 - 05. Jump up ^ `` Woodland brings ' Earth Hour ' initiative to Bengaluru in association with WWF ''. This Week Bangalore. March 25, 2013. Retrieved 2015 - 10 - 05. Jump up ^ `` CBRE Announces Client Properties Totaling 665 Million Square Feet Participated in WWF Earth Hour 2013 ''. CBRE Group. March 26, 2013. Retrieved 2015 - 10 - 05. ^ Jump up to : `` Timeline for Earth Hour 2013 '' ( PDF ). earthhour.org. p. 34. Archived from the original ( PDF ) on April 18, 2013. Retrieved October 5, 2015. Jump up ^ `` FIFA Supports Earth Hour ''. FIFA. March 23, 2013. Retrieved 2015 - 10 - 05. Jump up ^ `` UEFA backs Earth Hour ''. UEFA. March 28, 2014. Retrieved 2015 - 10 - 05. Jump up ^ `` Hilton Worldwide Celebrates its Commitment to Living Sustainably with Earth Hour Projects around the World ''. hiltonworldwide.com. 2015 - 03 - 25. Retrieved on 2015 - 10 - 05. ^ Jump up to : `` Celebrating Earth Hour ''. earthhour.org. Retrieved 2015 - 10 - 05. ( T ) he success of Earth Hour would not be possible without the support of other NGOs and NFPs. Global organizations such as the World Organization of the Scout Movement and the World Association of Girl Guides and Girl Scouts have been pivotal in spreading the Earth Hour message. Jump up ^ `` HSBC supports a greener planet ''. HBSC. Retrieved 2015 - 10 - 05. Jump up ^ `` Philips encourages residents to ' Make the Switch ' for Earth Hour and beyond ''. Philips. March 24, 2014. Retrieved 2015 - 10 - 05. Jump up ^ `` Earth Hour -- IKEA ''. IKEA. Retrieved 2015 - 10 - 05. Jump up ^ `` More Brands Than Ever Encouraging People Across the World to Use # YourPower for Earth Hour ''. Sustainable Brands. March 27, 2015. Retrieved 2015 - 10 - 05. Jump up ^ Sharleen D'Souza ( March 22, 2013 ). `` ING Vysya joins Earth Hour to light up Orissa villages ''. Business Standard. Retrieved 2015 - 10 - 05. Jump up ^ `` Celebrating Earth Hour ''. Earth Hour. Retrieved 2014 - 03 - 29. Jump up ^ `` The electricity impacts of Earth Hour : An international comparative analysis of energy - saving behavior ''. Energy Research & Social Science. 2 : 159 -- 182. doi : 10.1016 / j. erss. 2014.04. 014. Retrieved May 31, 2015. Jump up ^ `` Hour of no power increases emissions '' ( PDF ). The Australian. March 27, 2009. Archived from the original on October 2, 2015. Jump up ^ `` Q&A : Why Bjorn Lomborg wo n't be turning off the lights during Earth Hour ''. Mark Gollom, CBC News ( March 29, 2014 ). CBC News. Retrieved June 12, 2014. Jump up ^ Soloman, David ( May 9, 2007 ). `` Rage, rage against dimming of the light ''. The Australian. Retrieved 2008 - 03 - 29. Jump up ^ Bolt, Andrew ( March 28, 2008 ). `` Earth Hour coverage should be grounded '', Herald Sun, Retrieved 2011 - 03 - 20 Jump up ^ `` Sustainababble Podcast - Earth Hour ''. 29 March 2015. Retrieved 25 March 2017. Jump up ^ `` If you really care about climate change, boycott Earth Hour ''. The Independent. 2017 - 03 - 22. Retrieved 2017 - 03 - 25. Jump up ^ Does lighting candles for Earth Hour defeat the purpose ?, Christian Science Monitor, March 27, 2009 Jump up ^ `` Cái nhìn khác trong Giờ Trái đất '', Dân Trí Daily News, by Cường Cao, date : 2009 - 03 - 29. ( in Vietnamese ) Jump up ^ Marshall, George ( 2009 - 03 - 27 ). `` Earth Hour : Turning out the lights plays into the hands of our critics ''. The Guardian. ISSN 0261 - 3077. Retrieved 2017 - 03 - 25. Jump up ^ `` Human Achievement Hour 2015 ''. cei.org. Retrieved May 31, 2015. Jump up ^ McKitrick, Ross ( 2009 ). `` Earth Hour : A Dissent '' ( PDF ). Retrieved March 31, 2012. Jump up ^ `` Earth Hour ' will not cut carbon emissions ' ''. The Daily Telegraph. London. March 27, 2010. Jump up ^ `` I think my argument is so powerful that it 's not necessary to talk about it ''. YouTube. March 29, 2010. Retrieved 2012 - 03 - 31. Jump up ^ The Real Meaning of Earth Hour, by Keith Lockitch, Ayn Rand Institute, March 23, 2009 Jump up ^ `` The Carbon Sense Coalition ''. carbon-sense.com. Retrieved May 31, 2015. Jump up ^ `` Mies kuoli moottoripyörän alle pimeystempauksen pimentämällä tiellä ''. Helsingin Sanomat ( in Finnish ). March 27, 2010. Retrieved 2010 - 03 - 28. Jump up ^ `` Kaupunki sammutti katuvalot Earth Hourin ajaksi -- Mies jäi moottoripyörän alle pimeällä tiellä ja kuoli ''. Aamulehti ( in Finnish ). March 28, 2010. Retrieved 2010 - 03 - 28. Jump up ^ `` Jeremy Clarkson ''. The Times. London. ( Subscription required ( help ) ). External links Wikinews has related news : Businesses and individuals worldwide to turn lights off as part of Earth Hour 2009 Businesses and individuals worldwide turn lights off as part of Earth Hour 2008 Media related to Earth Hour at Wikimedia Commons Earth Hour Earth Hour LIVE Earth Hour 's channel on YouTube Earth Hour UAE Retrieved from `` https://en.wikipedia.org/w/index.php?title=Earth_Hour&oldid=837898483 '' Categories : Climate change and society Organized events Recurring events established in 2007 World Wide Fund for Nature Energy conservation Environmental protection March observances Hidden categories : All articles with dead external links Articles with dead external links from March 2010 CS1 Swedish - language sources ( sv ) CS1 Spanish - language sources ( es ) CS1 maint : Multiple names : authors list CS1 Indonesian - language sources ( id ) Articles with Vietnamese - language external links CS1 Finnish - language sources ( fi ) Articles with dead external links from June 2016 Pages containing links to subscription - only content Use mdy dates from October 2015 Use British English Oxford spelling from November 2017 Infobox holiday with missing field Infobox holiday ( other ) All articles with unsourced statements Articles with unsourced statements from March 2009 Articles with unsourced statements from October 2015 Articles with unsourced statements from September 2016 Talk Contents About Wikipedia ܐܪܡܝܐ Azərbaycanca Беларуская Български Bosanski Català Čeština Dansk Deutsch Eesti Español Esperanto فارسی Français Gaeilge گیلکی 한국어 Հայերեն हिन्दी Hrvatski Bahasa Indonesia Italiano עברית Kapampangan Қазақша Latviešu Lietuvių Magyar മലയാളം مصرى Bahasa Melayu Nederlands 日本 語 Norsk Norsk nynorsk ਪੰਜਾਬੀ پښتو ភាសា ខ្មែរ Polski Português Română Русский Саха тыла Scots Simple English Slovenščina کوردی Српски / srpski Srpskohrvatski / српскохрватски Suomi Svenska Tagalog தமிழ் Татарча / tatarça ไทย Türkçe Українська اردو Tiếng Việt Winaray 粵語 Žemaitėška 中文 55 more Edit links This page was last edited on 23 April 2018, at 17 : 59. 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Question: when do you turn off the lights on earth day
Answer: from 8:30 to 9:30 pm