4:20 is the time at which you smoke weed to excess. This is known as "blazing it". 420 is one of the primary MLG numbers used in montage parodies.
4:20 can be AM or PM, though people generally smoke at 4:20 PM because they're not sleeping at that time.
Did you know???
The wiki's theme was changed into Weed Theme once it reached 420 pages.
Totally SWAG interface... we had polls, but those were the days
This is what MLG Fandom used to look like moments before the dark times... before the desktop design