1967 1+9+6+7=23 easy
The answer is 1967. They only way to truly find that out without cheating is to test all of the possibilities. (the earliest is 1949, the others are 1958, 1976, 1985, and 1994)
Green Square
The password for level 156 is: six
if the lights have gone off whenever the cursor goes into a hand click it...
The answer to level 39 on the Never-ending game is pennywise
BAM
random
the answer is, larve
pants
tetris
the answer is pie
week
pants