sorry
if it makes you feel better your younger then my parents
I do a lot of science at school we use it a lot then...
we also have are school day planed on a 24hour clock
as I spend most of my time there I guess I am used to it
I think most people in day to day it would depend on what clock was nearest them (asking time) when they are speaking
and the situation
meeting up with friends is very different to trying to brake in to a bank for example or doing a milatry opiration
(I don't have expirence with any of the above
)