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
More Desktop Wallpapers:
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’Chess on ice’
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World Meteorological Day
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A misty morning in Brazil
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Last day of National Park Week
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Albion Falls, Hamilton, Ontario, Canada
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Butchart Gardens in Brentwood Bay, British Columbia, Canada
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South Beach in Miami Beach, Florida
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Taiwan yuhinas in Alishan National Scenic Area
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Craig Goch Dam in the Elan Valley of Wales
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Crescent Lake near Dunhuang, China
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African bush elephants in Namibia
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Happy Mothers Day!
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Feast of the Donkey
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Siblings Day
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Groundhog Day arrives—beyond a shadow of a doubt
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A different view of sharks
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It s leap day!
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World Otter Day
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Aerial view of a heart-shaped field in Trittau, Germany
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National Pearl Harbor Remembrance Day
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Happy Cinco de Mayo!
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A great white egret in Hungary
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Grandparents Day
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Celebrating Flag Day: ‘O long may it wave’
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Veterans Day
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Happy International Day of Forests!
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Let s face it: It s World Emoji Day
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International Day for Biological Diversity
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A monastery in the mountain
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An island oasis in the Indian Ocean
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