Why did Someone Just Wish Me a Happy 420 Day?

For those still a bit cloudy on the whole 420 Day celebration going on today, The Times of South Africa has this explanation:

...this numerical nickname for Mary Jane dates back to the seventies when a group of American high school students would gather together at 4:20 pm to smoke weed. Why such a random time? It's when most of their extra murals would be finished, so they'd all be free to get high together. To tip each other off about one of their marijuana meetings, they'd use the code word "420".Since 420 also translates as 4/20 on the calendar, April 20 was declared Weed Day in cannabis culture.

OK, now you know. Happy 420 Day!

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