10 best 4/20 sites: Where marijuana history was made

While it’s not yet on calendars, April 20 has become the unofficial holiday of marijuana, particularly in the growing number of states where pot has been decriminalized for recreational use. “It has become hugely celebrated,” says Brett Konen, an editor with Seattle-based Leafly.com, which calls itself the world’s largest cannabis information source.

Read more in USA TODAY.