Friday the 13th
Created on Dec. 22, 2018 by Julien Palard
Find the next friday the 13th.
Write a function named friday_the_13th
, which takes no parameter,
and just returns the date of the next friday the
13th.
If today is a friday the 13th, return it, not the next one.
Return the date as a string of the following format: YYYY-MM-DD.
Example
>>> print(friday_the_13th())
2019-09-13