Several thousand people gathered on Saturday at the historic Brandenburg Gate in Berlin to celebrate the first day of action for Germany's new legal cannabis law.
Around 4,000 participants gathered to smoke the formerly illegal substance for a "Smoke-In," according to the Berlin police.
Artists played music on a stage in front of the gate and there were rallies. The long-time juvenile court judge and cannabis activist Andreas Müller greeted the crowd with: "Dear no longer criminalized cannabis users."
It was a great day, he said, adding that Germany had taken the right path with legalization after a long period of prohibition.
Photos showed people with large, inflatable joints or wearing clothes with cannabis leaves printed on them. Signs read "Not everyone wants to get high!" or "No plant is illegal."
April 20 is a worldwide day of action for smokers of marijuana and hashish.
In the United States the number 420 - representing April 20 in the US style of writing dates - has long been a symbol for cannabis consumption. For example when people advertise for a roommate they would say that the flat is 420-friendly if residents are okay with cannabis use.