Fibonacci Day 1397

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 1397?

Fibonacci Day 1397 is on Thursday, 23 November 1397.

What day of the week is Fibonacci Day 1397?

It falls on Thursday.

How is Fibonacci Day calculated?

This event is observed every year on 23 November.