Fall is in the air—officially. The September equinox marks the transition from summer to autumn in the Northern Hemisphere, while in the Southern Hemisphere, spring is just beginning. The term "equinox," derived from Latin, means "equal night." It marks one of two points during the year when the sun sits directly over the equator, and the Earth receives roughly equal amounts of daylight and darkness.
Autumnal equinox
Today in History
More Desktop Wallpapers:
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World Poetry Day
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A festival of colors
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Bromo Tengger Semeru National Park, East Java, Indonesia
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Ah Shi Sle Pah Wilderness, New Mexico
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Beware the Ides of March
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Don t forget—it’s World Elephant Day
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International Sloth Day
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Merry and bright
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Whanganui National Park, Retaruke, New Zealand
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National Hummingbird Day
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Antarctica Day
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Celebrating Norwegian Constitution Day
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National Find a Rainbow Day
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Atlantic puffins, Wales
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Grand Teton National Park
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Mosque-Cathedral of Córdoba, Andalusia, Spain
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Independence Day
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Merry Christmas!
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Serra de Tramuntana, Majorca, Spain
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A Welsh wonder turns 70
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Gauchos showcase Argentina’s independent spirit
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Purple crocus flowers, Seven Rila Lakes, Bulgaria
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International Whale Shark Day
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US Election Day
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Red squirrel
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Time for brass bands and beer
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Iguazu Falls at the border of Argentina and Brazil
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Whooper swans in Lake Kussharo, Japan
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Replica of a Viking home in Dublin National Botanic Gardens, Ireland
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Presidents Day in America’s front yard
Bing Wallpaper Gallery

