It's November 5. Which means it's both a great time to watch "V for Vendetta" again, and it also means it's time for the "Million Mask March," where protesters, many aligned with Anonymous, will take to major city streets wearing the iconic Guy Fawkes masks.
But last year, those protests turned violent, and more than 50 people were arrested. This year, London is restricting the protest, including a three-hour time limit, USA Today reports.
Cities like New York, Los Angeles, Edinburgh and Brussels also have protests planned.
London police commander B.J. Harrington condemned the 2015 protests on Friday night but encouraged peaceful protest.
"We saw participants causing criminal damage to public property, smashing the windows of businesses and attacking police officers, Harrington said. “...The public found this completely unacceptable. This was not peaceful protest by any measure.”
Organizers said in a since-deleted Facebook post that police "are not your friends."
The march started early in Washington D.C.
The main event is set to start in London's Trafalgar Square at 6 p.m. local time.
The iconic masks represent Guy Fawkes, who was part of a 1605 plan to kill King James I by blowing up the Houses of Parliament. Fawkes later died in the Tower of London but was immortalized as a symbol of political protest. More recently, the masks played a major role in the graphic novel and subsequent movie "V for Vendetta" and have become a hallmark of Anonymous.