Which is fine when you know the other people are in another zone, except they then have to do the conversion in their heads. If you speak like most people do wh

Which is fine when you know the other people are in another zone, except they then have to do the conversion in their heads. If you speak like most people do when not thinking about time zones you just say a time. If time is the same for everybody then there is never any confusion. The computers are all doing it in UTC under the covers. The conversion is just because we have arbitrary layers on top of that.