Break out the calculators: November 23 is Fibonacci Sequence Day

Break out the calculators: November 23 is Fibonacci Sequence Day

Who doesn’t love a good math holiday? Most people know about Pi Day (3/14), but there are even rarer days on the calendar like Pythagorean Triple Square Day (9/16/25). However, it’s time to bust out the calculators in celebration yet again: November 23 marks the annual Fibonacci Sequence Day. The poetry of mathematics manifests everywhere in nature, but few numerical patterns are more common than the Fibonacci Sequence. First described in 1202 b…