Fibonacci Day

Fibonacci Day is celebrated on November 23 of every year. It honours Fibonacci sequence and Leonardo Bonacci who brought this series to our observation in 1202. He is one of the most leading mathematicians of the Middle Ages. This man is also called as Leonardo of Pisa, and he is also popularly known as Leonardo Fibonacci. The term Fibonacci is derived from the word filo Bonacci which means the son of Bonaccio. One of the fantastic things about the Fibonacci sequence is that this series is seen all over the world, for example, the display of Petals in flowers, the arrangement of leaves in plants etc.

The Fibonacci Sequence turns out to be the key to understanding how nature designs… and is… a part of the same ubiquitous music of the spheres that builds harmony into atoms, molecules, crystals, shells, suns and galaxies and makes the Universe sing.” – Guy Murchie

History of Fibonacci Day

Fibonacci Day is celebrated on November 23 because when this date is seen in the mm/dd format, i.e. 11/23, the numbers in the date form a Fibonacci sequence (1,1,2,3). A Fibonacci series is a sequence of no’s where a number is the total of the two no’s before it. For example: consider 1, 1, 2, 3 it is a Fibonacci sequence. In this, 2 is the total of the two numbers before it, i.e. (1+1). In the same way, 3 is the total of the two numbers before it, i.e. (1+2). The Fibonacci sequence is one of the most significant achievements of Leonardo Fibonacci came from a  puzzle about rabbit population. Leonardo Fibonacci posed this puzzle in his book named Liber Abaci. Leonardo of Pisa lived during the 12th and 13th century called as the best western mathematician. Leonardo Fibonacci was born in Pisa, Italy in 1170. He also helped to replace Roman numerals with the Arabic numerals that we know nowadays,  and he is the reason for making Hindu-Arabic numerals famous in Europe, but his most famous legacy is the Fibonacci Sequence. Fibonacci series first appeared in Indian Mathematics, called as Virahanka numbers and it was linked with the Sanskrit prosody. This  Fibonacci series is also connected to the golden ratio and the golden triangle, which is seen in nature again and again.

Fibonacci Day
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Fibonacci Day

Other celebrations on November 23

November 23 is also celebrated as

How to Celebrate Fibonacci Day

On Fibonacci Day, learn about the Fibonacci series and research more about its practical and theoretical uses and also go out into nature and find where Fibonacci sequence exists. For example, even in pineapples, Fibonacci sequence is seen. Then post pictures and share your thoughts about the day with others on social media using the hashtag #FibonacciDay.

Thank you for reading the post. You can celebrate every day with Happydays-365.com and Happy Fibonacci Day.

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