Moreso in the US for sure, because the service industry doesn’t make a living wage in most states (tipped minimum is something like $2.15/hr there!) . Tipping has been normalized in Canada as well, but as far as I know no one is making less than $15/hr across Canada, so our service industry doesn’t rely on it for survival in the same way the US does.

I think tipping is the norm across Canada.

The 10/20/30% is most likely pre-set on the system and can’t be changed based on take-out or dine-in.

Most times a tip is not expected on take-out (depending on what kind of service of course) , but it is still appreciated by the person who served you, or the kitchen who made your food, again, depending on the type of service.

I’ve had -2min or so after I’ve fiddled with my time settings on my device, so it likely has to do with some discrepancy between your device time and “real” time.

Daylight savings, as the other commenter said, does make sense.