Fibonacci Day Nov 23, 2025

Fibonacci Day

Look closely at this ammonite fossil. Its swirling shell, once home to a prehistoric sea creature, holds a mathematical secret—a spiral pattern. Each new chamber is proportionally larger than the previous one, maintaining a consistent growth ratio, often associated with the Fibonacci sequence.

© ThomasLENNE/Shutterstock

palette

Today in History

Nov 23, 2018Let the holiday shopping commence
Nov 23, 20191, 1, 2, 3: It s Fibonacci Day!
Nov 23, 2020Autumn comes to Old Town
Nov 23, 2021Fibonacci Day
Nov 23, 2022Fibonacci Day
Nov 23, 2023Happy Thanksgiving!
Nov 23, 2024Fibonacci Day

More Desktop Wallpapers:

Dec 7, 2025Pearl Harbor Day
Jan 5, 2026A herd of impalas, Londolozi Game Reserve, South Africa
May 6, 2020The (Inca) empire strikes back
May 1, 2018The Sky Over Nine Columns in Venice, Italy
May 31, 2026End of American Wetlands Month
Oct 20, 2025International Sloth Day
Jul 6, 2020Welcome to the Ring of Fire
Jul 11, 2019Evidence of human habitation
May 13, 2018Happy Mother’s Day
Feb 20, 2025Ansel Adams birthday
Sep 10, 2018Party like it’s 5779
Oct 28, 2023Castilla-La Mancha, Spain
Feb 9, 2025Alstrom Point, Lake Powell, Utah
Nov 21, 2025World Hello Day
Sep 17, 2018Gateway to America
Oct 31, 2022Wychwood Forest, Oxfordshire, England
Nov 17, 2019Remembering the Velvet Revolution
Mar 5, 2022Mont-Saint-Michel
Sep 21, 2019 The Wall for Peace
Feb 25, 2022 Legacy mural in Philadelphia
Sep 1, 2019Bidding summer adieu
Jan 21, 2023Kangaroo family for National Hugging Day
Jan 20, 2019It’s Penguin Awareness Day
Mar 25, 2021There was gold in them there hills…
May 12, 2021A visit to Limerick on Limerick Day
Oct 27, 2019A festival of lights in India
Jan 26, 2024Northern hawk-owl
Nov 26, 2018A little bit of Wonderland in New York City
Jun 20, 2024Summer solstice
Jan 6, 2021Travels to the Oregon deep