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:

Jun. 24, 2024Kelimutu, Flores, Indonesia
Jul 26, 2026International Day for the Conservation of the Mangrove Ecosystem
Aug. 8, 2024Spotted owlet, Bangkok, Thailand
An oasis in a sea of sand
A life-sized snow globe
Jan. 7, 2026Old Rock Day
A legend sprung from the ground
Perfect, pastoral Palouse
May 18, 2024International Museum Day
Dec. 20, 2025Christmas star lanterns, Germany
May 10, 2026Happy Mothers Day!
Sep 19, 2026Oktoberfest, Germany
Oct. 6, 2023Taughannock Falls State Park, New York
Apr. 15, 2026World Art Day
Jan. 25, 2024Snowy owl
May 30, 2024Everglades National Park, Florida
Regal Radiance
Reflecting on Christmas
Peek-a-boo, I see you!
This clever bird passes with flying colours
Zebras enjoying their day
Nov. 18, 2023Polar bear season in Manitoba
Urban planning never stops
Jan. 8, 2024Bernina Pass, Graubünden, Switzerland
Jan. 16, 2024Lake Louise, Banff National Park, Alberta, Canada
May 13, 2026Arch and Milky Way, Alabama Hills, Sierra Nevada, California, USA
A delightfully ornate Easter display
Jul. 11, 2025World Population Day
Feb. 17, 2024Sassnitz lighthouse, Rügen, Mecklenburg-Western Pomerania
Nature, art, and...math?