Sorry but what happened or what have to happen on 4/20 ??
420 is a "pot" day of sorts, people like to get stoned out of their minds on April 20. I don't know the history of why though.
tl;dr: (Wikipedia) The earliest use of the term began among a group of teenagers in San Rafael, California in 1971,[2][3] calling themselves the Waldos,[4] because "their chosen hang-out spot was a wall outside the school".[5] The group first used the term in connection to a fall 1971 plan to search for an abandoned cannabis crop that they had learned about.[4][6] The Waldos designated the Louis Pasteur statue on the grounds of San Rafael High School as their meeting place, and 4:20 p.m. as their meeting time.[5] The Waldos referred to this plan with the phrase "4:20 Louis". Multiple failed attempts to find the crop eventually shortened their phrase to simply "4:20", which ultimately evolved into a codeword that the teens used to mean pot-smoking in general.[6]
http://en.wikipedia.org/wiki/420_(cannabis_culture)
I don't think we'll see anything significant due to 4/20 being reflected on bitcoin. The volume that SR makes up isn't that large to begin with.
But I certainly will be celebrating!
I was always told that 420 was the police code for busting someone with weed. It was all a lie!