**Celebrated every year on November 23.**

**The Fibonacci sequence sounds like an obscure nerd thing.Which in some sense it is.The importance of the Fibonacci sequence isthat it returns in a lot of calculationsthat occur in physics and even biology**

A Fibonacci sequence is a sequence of integer numbers

that starts with 1

and then every number after the first two numbers of the sequence

is the sum of the two preceding ones.

The first 4 numbers of this sequence are

1, 1, 2 and 3.

Which explains this date of 11-23.

In other words: November 23!

The Fibonacci sequence is named after the Italian mathematician Leonardo of Pisa,

most famously known as Fibonacci.

He described the sequence in his 1202 book Liber Abaci*.*Before this, the sequence was kind of known in several other works

dating even before the year 0.

But Fibonacci put it in a clear formula

**,**

thus making it clear and easy for use

in pretty much every science that deals with patterns.

**Popular uses of the Fibonacci sequence are:**

- The Golden ratio occurs in almost everything nature.

You can find the Golden ratio in every flower, spiraling shells and even sleeping cats. - The golden ratio is a common guideline in pictures.

Our eyes find it pleasing when visuals are arranged in a way that follows the golden ratio.

It is one of the most popular guide settings when we take pictures with our phones. - DNA, the building blocks of every living creature, follows the Fibonacci sequence in how the DNA is build and how they multiply and even mutate.
- Fibonacci sequences are also used in written form.

Many Sanskrit documents wrote their prose and poetry in patterns that followed parts of the Fibonacci sequence. - In mathematics the Fibonacci sequence is one of the most practical recurring patterns, just like the number pi.
- Even in economics some predictions for trade are made with Fibonacci retracement.

You could say that when humans found out about the Fibonacci sequence, we made a very important step towards understanding the pattern of nature itself.

*“Where there is matter, there is geometry.”*

— Johannes Kepler