1 point
Pretty sure that iso standard of yours specifies using what you call military time, or 24 hour time system, which USA doesn’t use widely, so even they don’t use this standard
7 points
What are you even talking about?
Most countries use a 24hr clock
Many countries that use a 24hr clock don’t even use ISO8601 officially.
The only countries I know officially use ISO8601 are certain East Asian countries.
I don’t think they even use ISO8601 in the US Military.