The biggest celebration day in the cannabis culture is April 20. The April 20 (4/20) celebration originally started in the mid 1970s as the time of day after school, 4:20 pm, for high school students in San Rafael, California to meet to smoke pot. The phrase "I'll see at you at 4:20" became code for, "I'll be there to smoke a joint with you after classes are over".
There wasn't a police officer to be seen as crowds of people gathered under Seattle's Space Needle early Thursday morning to light up and celebrate a new reality: Marijuana is legal under Washington state law.
Pot-smokers lit up in Washington state Thursday as recreational marijuana became legal in a historic first for the United States, clouded by the fact that federal law still bans the practice.