On the Nov. 8 edition of Last Week Tonight, John Oliver took a look at a historic moment for America's prison system.

On the first weekend of November, the largest one-time release of federal prisoners in American history occurred. More than 6,000 inmates were released on early parole as part of attempts to reduce the length of prison sentences for non-violent drug offenders.

To help bring parolees up to speed with major changes in the world, Oliver offered a quick summary, some of which would interest the nearly nine percent of people who had been jailed for cannabis-related offenses:

"Uber's replaced cabs. Everyone pretends to like kale now. Matthew McConaughey has an Oscar. And in four states, pot is legal, which for some of you must seem like a cruel, cruel irony."

Check it out: