In Hawaii, 4:20 is a good time to be home. With your chocolate. And maybe some pizza. A few cookies, some good ice cream, maybe a handfull of peanuts…
The only thing people have to fear from stoners is for thier snacks.
Since moving, I haven’t seen quite the same “culture” as Hawaii for smoking. Maybe I just don’t know were to look. 
I’m 23, most of my friends live here or Santa Cruz. As such, 420 is common knowledge for just about everyone I know. I asked my mom about it (my parents are former stoners) and they had no idea.
Wouldn’t the highlight of that be 4:20 on 4/20?
I was gonna celebrate National Stoner Day
but I got high…
…and I missed it.
(Shel Silverstein)
At my advanced age (45), even an ancient fossil like me can be “hip” to the latest “cool” slang. Thanks to the Dope! I have known about 4:20 for years, thanks to a thread just like this one on the SDMB years ago. So that when my teenager began dropping 4:20 hints all the time, I knew what she was up to.
The other day we were giving a ride home to someone we met at a poetry jam, and DD said “Tomorrow is 4/20. Four twenty, get it?” Our passenger spoke up, Oh you enjoy 420 too, so do I…