Worldwide
Fibonacci Day
Nature's perfect sequence — 1, 1, 2, 3, 5, 8…
When is Fibonacci Day?
Every year on November 23.
What is Fibonacci Day?
Fibonacci Day is celebrated on November 23 because the date written as 11/23 matches the start of the Fibonacci sequence: 1, 1, 2, 3. In the sequence each number is the sum of the two before it, and it was introduced to Europe by the Italian mathematician Leonardo of Pisa in his book Liber Abaci in 1202. The same numbers appear in sunflower heads, pine cones and spiral shells, and teachers use the day for nature walks and maths puzzles.
How to celebrate
Mark the day with a poster made in Dayfeed — pick your favourite photo as the background, share it to your story or group chat, and set a reminder so you never miss it next year.
Hashtags
- #FibonacciDay
- #Fibonacci
- #MathDay
Try it: save this day's poster to your Pinterest board.
This is the Fibonacci Day poster, made with Dayfeed. Pin it to your board — no app needed.
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