Thousands of people flocked to Hyde Park in London this afternoon to smoke weed in the sunshine – in full view of officers.
The annual tradition began in America because their calendar date is 4/20.
There are many stories behind the significance of the number in stoner culture, but the most common is that 4.20pm is touted as the best time of the day to start smoking the narcotic.
Today in London, around 5,000 people gathered way before the allotted time, and many sparked up suspicious-looking cigarettes.
However despite this, no arrests were made.
In fact, Scotland Yard praised the well-natured crowd.
Some revellers were seen shirtless, soaking up the sun while enjoying rolled-up cigarettes.
A Met Police officer on a bike was spotted riding through the sitting crowds – next to people that appear to be smoking items affectionately nicknamed Camberwell Carrots due to their large size and shape.
A Scotland Yard spokesman said: We were aware of a planned event in Hyde Park.
A proportionate policing plan was in place.
The crowd were well-natured.
He added: Our approach to enforcing drug legislation was no different to any other day of the week.