The world will go dark on March 25, 2017 in observance of the Earth Hour 2017. Several famous landmarks all over the world will be hidden by the darkness for an hour.

The first global blackout happened in Sydney, Australia on the 31st of March at 7:30 to 8:30 PM. 2007 after the World Wildlife Foundation. It was observed to remind people to conserve electricity and energy to fight global warming. Earth Hour means switching off all lights and other appliances for an hour to show support to the movement against global warming. During the first year, the residences and business in Sydney, Australia that participated was more than 2 million, according to Beyond the Hour.

Earth Hour became popular and since 2008, it has become an annual global event scheduled every Saturday of March. This year, 135 countries will participate in the activity.

The one hour blackout is not long enough to have significant impact on global warming. The event is symbolic. It shows that people around the globe are against activities that can hasten the rise of temperature of the Earth. If all people around the glove can find means to reduce consumption of fossil fuels, it might be enough to slow down global warming, according to USA Today.

In this year's Earth Hour celebration, several famous landmarks will disappear from the skyline as all lights will be switched off. These are the Golden Gate Bridge in the US, the Eiffel Tower in France, the Pyramids of Egypt, and the Colloseum of Rome. Some worthwhile activities during the blackout will be a candle light dinner or gazing at the stars.

Several hotels will be showing their support in different ways. Hilton hold a competition dubbed "Travel with Purpose" and winners will enjoy a five-night stay in Iceland at the Canopy by the Reykjavic City Centre. Fairmont Washington D.C. will raise money for the World Wildlife Fund by selling "Going Green Martini".