Thousands of people filled up Golden Gate Park Sunday to celebrate what is still an illegal recreational substance in California: marijuana.
April 20, or 4/20, has become kind of a de facto holiday in the United States, and this year, it falls on Easter Sunday.
San Francisco police said a year ago there were fights, traffic jams, and drug-dealing, so this year, officers will be on-hand to make sure everyone is safe.
"Behind you, you can see not more than one, two, three, four, five, six, seven police cars," said a man attending the celebration, who chose to remain anonymous. "So, I believe there's a heightened police presence, yes."
"Good for safety, but bad when it comes to police harassment," he added. "I mean, it's just people sitting here celebrating something that we all believe in, that we all have faith in."
The cost to clean up last year's event was about $15,000.
Here is YouTube video of last year's party: