Fibonacci Day

11/23: the date that writes itself as a Fibonacci sequence (1, 1, 2, 3).

Fibonacci Day on November 23 celebrates the Fibonacci sequence (1, 1, 2, 3, 5, 8, 13, 21...), in which each number is the sum of the two preceding it. The date November 23 (11/23) forms the first four numbers of the sequence. Leonardo Fibonacci introduced the sequence to Western mathematics in his 1