How wonderful it is that everyone's time intervals are measured in the same units and the phrase "in 15 minutes" is understood the same way throughout the civilized world.
There's no such thing as one person's minute lasting longer than another's. Or that in the USA instead of a second, they use some kind of "tick" that equals 1.672 seconds, and a day consists not of 24 hours, but of 4 "quarter-days".
If that were also the case, programmers would go insane. They already have enough to deal with leap seconds and time zones.