Hm. That's unusual unless the kata itself didn't do good enough QC so there's too much variation in the random tests... I guess sometimes maybe the coderunner runs a bit slow, but it doesn't happen a lot at least in my experience.

It's also always a possibility that tests were changed to be stricter, but obviously if that hasn't happened then yeah.

If you find that things are running very slowly, I'd just try again another time. Also please note raising an issue should be related to the kata... not CW itself ;) (this was more of a question, issues are for things about a kata that need fixing :)

Your performance on a fast PC is always going to be faster than the servers here.

Fixed

Probably because of a VM error. I got the same error, so I took a different approach.

Kata's are designed to practice not to learn, you learn a kata by learning the required moves/punches (skills), once you master the moves individually you can try mastering the kata (skillset), once you master the kata you can use the individual abilities in a fight (real life job). Beside that if you have any question ask it here and mark it as suggestion. If you have any suggestion to enhace the description tag it as suggestion.

Hey!
"Subtract" is the correct word, not "substract", so there is no error.

Thanks. Fixed

Trust me I did check for that because some guy had some pretty esoteric date validations ( a little bit like those in your solution ) and indeed was not including febrary 29 on bisiest years. That's why I included that validation with the name testBisiest. But don't worry I'll add your on april.