Return to top. The Global Marijuana March (GMM) is also known as the Million Marijuana March (MMM). GMM events worldwide are held the first Saturday in May, or thereabouts. For many photo, video, media, and report links go to the GMM and GMM links pages. There are many more 2005 GMM pages on the web than are linked here. Some of the links below on the city list no longer work. See the archives to find those lost pages.