I think there is 1 such kata (can't find it).

• there is another one

is there a kata that has excellent random distribution checking?

Very valid point; thanks for your feedback. I have updated the tests to generate dates much closer to the 'present', your solution has been invalidated ;-)

let me know if there are further problems

Fixed.

That's Haskell's function declaration syntax (maybe some other languages use it too), and it indeed should not be used for ASM katas.

I see that this has been done by someone else.

Thank you for the suggestion.

Fixed.

Particularly true for Python, where None is a keyword

Added in the "Initial Solution" tab :

using System;
using System.Collections.Generic;

though I always thought it was part of the job of the solver to include what is needed... Lazyness is everywhere:-)
Cheers.

Fixed