Fibonacci Day Nov. 23, 2024

Fibonacci Day

On Fibonacci Day, mathematicians and scientists honour one of their own: Leonardo Bonacci. More commonly known as Fibonacci, the medieval mathematician is notable for popularising the Hindu-Arabic numeral system, with its use of zero, decimal points and 10 numbers instead of the ponderous Roman numeral system. He"s most famous, however, for his sequence of numbers: 0, 1, 1, 2, 3, 5, 8... By adding the first two numbers, you arrive at the third and adding the previous two numbers, you arrive at the next number, and so on. Disregarding the zero, the first four numbers correspond to today"s date, 11/23.

© Michael Melford/Alamy

palette

Today in History

Nature, art, and...math?
Nov. 23, 2023Teide National Park, Tenerife, Canary Islands, Spain
Nov. 23, 2025Fibonacci Day

More Desktop Wallpapers:

A cantilevered window to the past
Sep. 28, 2025Town of Pienza in Tuscany, Italy
Jul 22, 2026Coral Reef Awareness Week
Jul 16, 2026Navy Pier, Chicago, Illinois, United States
Birthplace of the Renaissance
What waterborne wizardry is this?
Dec. 23, 2024Celebrating Festivus
Sep. 2, 2025Camel thorn trees, Namib-Naukluft Park, Namibia
Jun. 20, 2024Summer solstice
Dec. 10, 2024Lands End, Cornwall, England
Say hello to these halophytes!
Celebrating the tropics
Jul. 28, 2025World Nature Conservation Day
Mar. 22, 2026World Water Day
Nov. 22, 2025Leshan Giant Buddha, Sichuan, China
Mar. 7, 2026The Brocken, Harz National Park, Germany
A beach of many colours
Something to ‘bee’ thankful for
Jellies in a world of their own
Dec. 13, 2025Merced River, Yosemite National Park, California, United States
Jul 5, 2026Lavender rows, Plateau de Valensole, Provence, France
Feb. 18, 2024World Whale Day
Sep. 17, 2024Mid-Autumn Festival
A warm hug in the icy north
May 1, 2024Lei Day
Mar. 25, 2025Tolkien Reading Day
Aug. 25, 2023Yellowstone National Park, Wyoming
Sway with the Amazonian canopy
Apr. 9, 2025Naxos, Cyclades, Greece
Saving and celebrating honey bees