4/20 in the age of coronavirus, explained

In normal times, April 20 would be 4/20, the unofficial holiday for celebrating marijuana. People would be preparing to rally near state capitols, in concerts, and at huge fairs to fill the air with thick, pungent smoke.

But April 20 this year, on Monday, doesn’t come during normal times. With a coronavirus pandemic still going, much of the United States and the rest of the world are staying at home as much as possible to avoid the spread of Covid-19, the disease caused by the SARS-CoV-2 virus. That means the...