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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Get amped for Glastonbury
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Aerial view of the Colorado River Delta in Mexico
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Storks ready for takeoff
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Little Pigeon River, Great Smoky Mountains, Tennessee
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Winter solstice
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Jerte Valley in bloom
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From the mind of Frank Gehry
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Silbury Hill for International Archaeology Day
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It’s World Migratory Bird Day
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Harbor and longtail boats at Ko Samui, Thailand
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Icelandic horses, Iceland
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Tufa formations in Mono Lake, California
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Longer days mean warmer sand
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In Texas, even the riverbend is big
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Manatee Appreciation Day
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Venture into a prehistoric gallery of art
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Daylight saving time begins
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World Architecture Day
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Jackie Robinson Day
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Blue walls of Chefchaouen, Morocco
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Bringing together history and technology
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Bohemian waxwings in Canada
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The crossroads of empires
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A seabird gets schooled
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Eben Ice Caves, Upper Peninsula, Michigan
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National Park Service anniversary
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Where is this wintry road?
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Ardez, Graubunden, Switzerland
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A crane for good luck in today’s big game
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Aloe in bloom
Bing Wallpaper Gallery

