if some little kid promises u something but u dont get it, he will probably say it was opposite day. If i said it was opposite day then im realy saying it isnt opposite day but saying that………….it is. so, to get to the point…..how do you realy know its opposite day? i guess thats just 1 of life’s many unanswered questions like Can you slam a revolving door?,Why do males have nipples and Where do babys come from?:D. if you have an answer to any of these please tell me. (dont answer that last question) :D