Fall isn"t just marked by the calendar. Each September, Earth"s subtle tilt brings the autumn equinox—one of two times a year when day and night are nearly equal in length. It marks the beginning of fall in the Northern Hemisphere. From solar alignments to changing leaves, nature offers its own quiet signals that the season has shifted. While for most of us it may seem like just another day, ancient cultures paid close attention to this change. Sites like Chichén Itzá in Mexico and England"s Stonehenge were designed to align with the rising or setting sun during equinox days.
Autumn equinox
Today in History
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International Lighthouse and Lightship Weekend
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French River, Ontario
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International Polar Bear Day
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Pollinator Week
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World Maritime Day
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Short-beaked echidna, Adelaide Hills, Australia
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Blooming sunflowers
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Turtle-y nice day for a swim
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Stripes in sight
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Katahdin Woods and Waters National Monument, Maine, USA
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Fisgard Lighthouse National Historic Site
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Bowling Ball Beach, California, USA
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World Oceans Day
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Great white egret, Hungary
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A warm hug in the icy north
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Mount Hood, Oregon
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Racing through the five boroughs
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St. James Tidal Pool, Cape Town, South Africa
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Methow Valley, North Cascades, Washington
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Ancient til trees in Fanal Forest, Madeira, Portugal
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Kirkjufell, Iceland
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Grandparents Day
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Christmas Eve
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International Museum Day
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American Red Cross pioneers
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The white trilliums in Ontario, Canada
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Unbe-leaf-able
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Lake Tahoe
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Kluane National Park and Reserve, Yukon
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Nuit Blanche Toronto
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