4/20 (Cannabis Culture Holiday) Date in the current year: April 20, 2016

4/20 (Cannabis Culture Holiday) April 20 is a counterculture holiday dedicated to smoking and celebrating cannabis. It is typically written as 420 or 4/20.

There are different theories concerning the connection between the number 420 and cannabis subculture. The post popular theory says that the term 420 was first used by the Waldos, a group of teenagers from San Rafael, California. In 1971, they decided to search for an abandoned cannabis crop and agreed to meet near the Louis Pasteur statue at 4:20 p.m. They referred to their plan as “4:20 Louis”.

The phrase was eventually shortened to simply 420 and evolved into a codeword used by teenagers to mean cannabis-smoking in general. Observances based on the number include the consumption of cannabis either at 4:20 p.m. on any given day or on April 20, as this date can be written 4/20.

On April 20, cannabis smokers celebrate and consume marijuana. Some people organize events in support of the legalization of cannabis.

If you intend to celebrate 4/20, keep in mind that possession of cannabis is illegal in most countries. As of 2015, possession of cannabis is legal or effectively legal in Uruguay, the Netherlands, and the US states of Colorado, Oregon, Washington, and Alaska.

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