Fibonacci Day 1991

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 1991?

Fibonacci Day 1991 is on Saturday, 23 November 1991.

What day of the week is Fibonacci Day 1991?

It falls on Saturday.

How is Fibonacci Day calculated?

This event is observed every year on 23 November.