Fibonacci Day 1521

Fibonacci Day uses the month and day notation 11/23 to echo the opening numbers of the Fibonacci sequence: 1, 1, 2, 3.

Frequently asked questions

When is Fibonacci Day 1521?

Fibonacci Day 1521 is on Wednesday, 23 November 1521.

What day of the week is Fibonacci Day 1521?

It falls on Wednesday.

How is Fibonacci Day calculated?

This event is observed every year on 23 November.