An unidentified man wears a mask with a pipe connected to it on Hippie Hill in Golden Gate Park in San Francisco, Monday, April 20, 2009. According to Steven Hager, creative director of High Times magazine, the term "4/20" originated in Northern California in 1971. A group of friends heard about an abandoned marijuana patch and began meeting at 4:20 p.m. to go foraging. The patch proved elusive; the term stuck.
(Photo: AP Photo/Jeff Chiu)
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