Weekly Challenges
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Spoiler
I used today's date to calculate Friday the 13ths. For years there was no Friday the 13th, when I ran it on January 10 2023, there is 1 year without a Friday the 13th. That will change on Friday, January 13. What is the max number of Friday the 13ths in a single year - it is 3 for years 01-01-1900 to 01-01-2013. Will it ever be 4? I don't know, but it would be easy to figure out!
