Autumnal equinox Sep 23, 2023

Autumnal equinox

Autumn has officially begun! In the Northern Hemisphere, the autumnal equinox falls on September 23 this year, marking the beginning of autumn. Today is one of the two moments in the year when day and night are equal in length, thanks to the sun"s location exactly above the equator. In the Southern Hemisphere, today marks the vernal equinox and they are heading into spring.

© Stephen Matera/Tandem Stills + Motion

palette

Today in History

Sep 23, 2018Ahh-tumn
Sep 23, 2019Stepping into autumn
Sep 23, 2020A tree of many memories
Sep 23, 2021Last stop before leaving the solar system
Sep 23, 2022Golden jellyfish in Jellyfish Lake, Palau
Sep 23, 2024Sea Otter Awareness Week
Sep 23, 2025A keel-billed toucan in Costa Rica

More Desktop Wallpapers:

Apr 22, 2025Earth Day
Sep 20, 2025Oktoberfest begins!
Feb 15, 2025The natural ice wall of Misotsuchi, Chichibu, Japan
Jul 25, 2021Illuminated Uluru
Sep 17, 2025A young bull moose in Denali National Park, Alaska
Jul 4, 2024Independence Day
Mar 26, 2026Logan Creek Suspension Bridge, West Coast Trail, Canada
Apr 14, 2019A view fit for a queen
Jul 20, 2021Fly me to the moon
Dec 8, 2021Petrified Forest National Park
Oct 23, 2021Eurasian scops owl
May 15, 2022Lunar eclipse
Oct 19, 2020A cliff-hanging complex of temples
Feb 17, 2021The persistence of Perito Moreno
Mar 20, 2020Heron lies the Salton Sea
Nov 1, 2021Native American Heritage Month
Nov 13, 2020Once upon a midafternoon dreary…
May 19, 2021A path lain with petals
May 20, 2021Happy Bee Day to you
Apr 28, 2020Happy 800th, Salisbury Cathedral
Dec 17, 2024Traditional red fishermens cabins, Reine, Norway
May 3, 2024The Sonoran Desert, Arizona
May 13, 2024Fish River Canyon, Namibia
Apr 4, 2019Taking the forest to the cloud
May 18, 2021International Museum Day
Sep 23, 2025A keel-billed toucan in Costa Rica
Jul 27, 2023Arc de Triomphe du Carrousel and the Louvre Pyramid
Dec 4, 2021Cheetah mother and cub
Mar 5, 2023Cherry blossom season in Tokyo
Jan 14, 2026National Take the Stairs Day