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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Next stop, Tofino
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The Great Glen
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Take the Stairs Day
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Christmas Bird Count
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Ansel Adams birthday
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Honoring our fallen heroes
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Roman bridge of Córdoba, Spain
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National Park Week
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Vineyards in the Mosel Valley, Rhineland-Palatinate, Germany
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Vila Franca Islet, São Miguel Island, Azores, Portugal
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Horsetail Fall in Yosemite National Park, California
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It’s World Migratory Bird Day
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Ode to the sun
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Dunluce Castle, County Antrim, Northern Ireland
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A towering view of the Pale Mountains
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Labor Day
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The snows of Fuji
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Tracking ships on the Day of the Seafarer
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Earth seen from the International Space Station
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To the 155th on the 155th
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Preservation Hall in New Orleans, Louisiana
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Salar de Uyuni in Bolivia
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World Oceans Day
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Let the holiday shopping commence
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Muniellos Nature Reserve
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National Hummingbird Day
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World Water Day
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Art over Amalfi
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Maple and bamboo forests in Arashiyama, Kyoto, Japan
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The call of the wild in Alaska
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