it's 4:20. so what the hell does it have to do with pot?

http://en.wikipedia.org/wiki/420_%28cannabis_culture%29#Origin_theories here's what wikipedia told me. i guess never having toked up, unless you count second hand inhalation at concert's/parties, i don't get the whole 4:20 thing. but at least i have heard about it. several other people at work were like, what's 4:20?

anyone want to explain further?

or is it really just an excuse to get all smoked up every afternoon, and all day once a year?