When the lights go down, the universe puts on a show. International Dark Sky Week, celebrated each April, invites everyone to rediscover the night and learn why darkness is worth protecting. Launched in 2003, the week highlights how excessive artificial light affects wildlife, human health, energy use, and our ability to see the stars. Fewer lights don"t mean less safety—smart, well-designed lighting can do both.
International Dark Sky Week
Today in History
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Where is this wintry road?
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World Olive Tree Day
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Spreadsheet Day
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Turning darkness into light
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Glass footbridge in Zhangjiajie, China
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Lighting it up for Vivid Sydney
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International Day of the Tropics
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Lanterns alight in Pingxi
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Autumn in Central Park, New York
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International Museum Day
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Native American Heritage Day
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The Cordillera de la Sal in the Cordillera Domeyko Range of Chile
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National Pumpkin Day
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These patterns tell a story
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World Bamboo Day
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Three cheers for polar bears!
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Badlands National Park turns 44
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From pirate port to nature preserve
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It’s Penguin Awareness Day
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Chilling out in the Arctic
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A snuggling ball of cute
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Earth Science Week
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Indigo bunting
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Adorable activism
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Colorful houses of Las Palmas de Gran Canaria, Spain
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Old underground cellar, Bavaria, Germany
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Welcome to the drainpipe of the Pacific
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Harbor and longtail boats at Ko Samui, Thailand
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Martin Luther King Jr. Day
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A species no longer at risk
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