Clearing the air on the origins of 420, the unofficial national

Some people have different opinions and theories about how the numeric name came to pass, but there appears to be general consensus behind one legend.
The origins of the holiday are a bit fuzzy.
Weed lore has it that in the 1970s, a group of California teens would use 420 as a code word to signal after-school smoke sessions.

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Clearing the air on the origins of 420, the unofficial national marijuana holiday - ABC News

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