I work across time zones daily. If I'm using a UI, I expect dates to be displayed in my time zone. If I'm communicating with someone in another time zone, then

I work across time zones daily. If I'm using a UI, I expect dates to be displayed in my time zone. If I'm communicating with someone in another time zone, then I'll use relative time. However, in their head, they're still going to be converting that to local time. I don't see why you wouldn't just want to skip the middle man.