Yes, today is 4/20. Go ahead, giggle. The most commonly accepted origin story is that some high school students in Marin County (north of San Francisco) picked 4:20 PM to meet in a park and spark one up.
It’s a jolly good July 1st as Wimbledon starts across the pond, assuming you’re reading this somewhere besides England. Fans of irony and tennis appreciate Americans winning at Wimbledon on Independence Day.