Fibonacci Day 23 Nov 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

Finding maths in nature
23 Nov 2023Teide National Park, Tenerife, Canary Islands, Spain
23 Nov 2024Fibonacci Day

More Desktop Wallpapers:

In the running
Aug 28, 2023Dubrovnik, Croatia
The envy of postcards and snowglobes
What returned to this city 500 years ago?
13 Oct 2024Royal Alcázar of Seville, Spain
2 Jan 2026Aerial view of Venice, Italy
3 Oct 2024National Poetry Day
Beauty by the bay
19 Apr 2024Ring of Brodgar, Orkney, Scotland
The road less taken?
19 May 2024Vernazza, Cinque Terre, Liguria, Italy
6 May 2025An ultralight aircraft flying over the sands of Namibia
10 Apr 2025Wales Millennium Centre, Cardiff, Wales
17 Apr 2025Andean cocks-of-the-rock, Ecuador
12 Nov 2024Arches National Park, Utah, United States
28 Oct 2025The Gothic Gate in the Adršpach-Teplice Rocks, Czechia
13 Dec 2023Svolvaer, Lofoten Islands, Norway
7 Dec 2025A pine forest in Alsace, France
20 Oct 2024International Sloth Day
30 Sep 2025Koala in the Great Otway National Park, Australia
19 Feb 2024Puerto de la Cruz, Tenerife, Spain
Celebrating the tropics
Tis the season for travel
Remembering D-Day
23 Aug 2025European fallow deer in England
21 Nov 2025World Hello Day
22 Sep 2023Hobbit Day
6 Apr 2025Gaztelugatxe islet, Basque Country, Spain
21 Sep 2025Sea Otter Awareness Week
A public restroom or a tourist spot?