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

Nature, art, and...math?
Nov. 23, 2023Teide National Park, Tenerife, Canary Islands, Spain
Nov. 23, 2024Fibonacci Day

More Desktop Wallpapers:

High above the Aegean Sea
Nov. 25, 2024Maasai giraffes in Amboseli National Park, Kenya
Apr. 23, 2024World Book Day
Fragrant fields as far as the eye can see
Beauty by the bay
Aug. 7, 2024St. Joseph North Pier Inner and Outer Lights, Michigan, USA
A life-sized snow globe
Jan. 21, 2025Squirrel Appreciation Day
Sep. 3, 2023Skyscrapers in Manhattan
Behold the architectural marvel
Jan. 20, 2024Macaroni penguins, Drake Passage, Chile
Jun 26, 2026The River Thames, London, England
Oct. 15, 2023European hedgehog
Jul. 21, 2024Kendwa village, Zanzibar, Tanzania
Like paint on a canvas
Oct. 28, 2024Pumpkin field, Victoria, British Columbia
May 24, 2026A mute swan reflected on tranquil waters
Beautiful from all angles
Aug. 25, 2025Colony of northern gannets in Quebec
Let’s go to the Ex!
Feb. 19, 2026Dragons Eye, Uttakleiv Beach, Norway
Sunlight turning silver to gold
Oct. 8, 2025World Octopus Day
Oct. 13, 2024Royal Alcázar of Seville, Spain
Apr. 8, 2024Total solar eclipse
Oct. 12, 2025Village of Saranac Lake, New York, United States
Apr. 30, 2025International Jazz Day
Remembering D-Day
Jul. 18, 2025Orosei, Sardinia, Italy
One of the oldest parks in Quebec