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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Mont-Saint-Michel, Normandy, France
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Celebrating Labor Day
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International Day for Biological Diversity
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Children at play for International Day of Friendship
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It s World Poetry Day
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A grand event
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Summer solstice
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Caribbean flamingos, Yucatán Peninsula, Mexico
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Spring awakens
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Least chipmunk, Kootenai National Forest, Montana
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The dancing trees of Sumba Island
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My my, it s Syttende Mai
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It’s Canada’s national day
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International Tea Day
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Pitigliano, Tuscany, Italy
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A festival of lights in India
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Ruins of Inca temples and terraces on Huayna Picchu, Peru
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International Day for Biosphere Reserves
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The scene of a literary crime
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It s only Wednesday
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Kirkilai lakes, Biržai Regional Park, Lithuania
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Goðafoss waterfall, Iceland
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A light at the edge of the world
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International Whale Shark Day
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Four Sisters, thousands of trees
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Happy Mothers Day!
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Cherry blossoms at Tom McCall Waterfront Park, Portland, Oregon
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World Meteorological Day
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Hohenzollern Castle near Stuttgart, Germany
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National Take the Stairs Day
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