Write a bulletproof date validation routine.

[Moneo]

Yes, some thoughts from the real world experience...

• NOTICE:
  Code below was **NEVER** tested! I'm bored at the office and compiled this one!.. If possible, debug it and, kindly ask me to edit the post (or, post the correct one)!..

To catch your attention later, list starts off from 2, and this is not a bug -- keep reading! :-D

OUTPUT: The message "VALID" or "INVALID".

(2) To me, this doesn't necessarily mean the function returning the actual word. If not needed, functions **DO NEVER RETURN STRINGS** (yes, they're like math functions)!.....

Your remarks about the Valid Invalid strings are true. I used these specific strings to emphasize the result for the challenge. For "real world" as you say, they would return true (-1) or false (0).

Your remark of "code below was never tested!" completely turned me off regarding any appreciation of your suggested code "improvements".
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