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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The natural ice wall of Misotsuchi, Chichibu, Japan
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A timeless view of the night sky
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We stand with Ukraine
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Polar Bear Week
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Hoisting a flag for seafarers
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National Fossil Day
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Hoodoos, Sunset Point, Bryce Canyon National Park, Utah
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Swim city
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A legend and a legendary home
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Happy Cinco de Mayo!
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Frozen beauty
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Seceda, Dolomites, South Tyrol, Italy
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A personal collection becomes an institution
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Sea Otter Awareness Week
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Göreme, Cappadocia, Turkey
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Celebrating Festivus
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Seattle Central Library, Seattle, Washington
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Happy Easter!
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Holey moley–it’s National Doughnut Day!
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Fiordland National Park, New Zealand
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National Aviation Day
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Mesquite Flat Sand Dunes in Death Valley National Park, California
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New Years Eve in Rio de Janeiro, Brazil
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English National Ballet performing The Nutcracker
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Celebrating all things Austen
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Nuwara Eliya, Sri Lanka
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A lunar lantern celebration
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World Jellyfish Day
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Fire-damaged forest near Wolf Creek Pass, Colorado
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World Meteorological Day
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