Today is a Fibonacci day. That is a day in which the month, day of the month, and last two digits of the year are all Fibonacci numbers.
You may never have heard of a Fibonacci day before. That’s because I just made it up.
In the case of today, we are in month 3, day 13, and year 21. These are all found in the sequence of Fibonacci numbers: 1,1,2,3,5,8,13,21,… (The rule is you add the sum of last two numbers in the sequence as the next number. Eg: 5+8=13).
As an exercise, see if you can figure out how many Fibonacci days there are this year.
Here’s an easier one: What is the one date this year that is a successive Fibonacci day? That is a day containing three successive Fibonacci numbers.
And then, when is the next successive Fibonacci day after that? Hint: it’s not this year. That will be an interesting day because it will be the last successive Fibonacci day for a very very long time.