I have a buddy who used to call Weights and Measures on bars that passed off US customary pints as "pints". It is illegal, but enforced largely by complaint.

Also Canadian. I don't often see "pint" on the menu, usually something like "16oz." Evidently restaurateurs and bar owners are wise to the law. Though I am pleased when I see "20oz" on the menu!

I kind of understand the logic by not serving 20oz and saying "pint". Customers might avoid a place because their "pints are more expensive", when in reality that place is also serving them 4oz of extra beer. A bit like the classic 1/3 lb cheeseburger being "smaller"[1].

Annoyingly, I do find that servers will often refer to their larger size beer as "pint" regardless of whatever the menu says.

[1]: https://en.wikipedia.org/wiki/Third-pound_burger#Marketing_f...