I've also heard things such as there are 420 different chemicals in weed. Not sure how accurate that is however and it's not necessarily what I believe. I've also heard that 420 was police code for some sort of marijuana charge. Ya know like... "Roger that, we've got a 420 on broad street" or some shit lol. Again, I don't endorse either of these views. Honestly I can see the 4:20 time thing as most plausible. Haha it would be just like a stoner to associate that time with a date and make it the international day of tokin haha. Jeez, I'm blitzed right now. Happy holidays.