Hacker News Reader

I've always heard it like "16 hundred hours", though I admit that it might be hard for some people to adjust. I'll usually say something like "Does eleven work for you?", meaning 11am. Since the US is -5 to -8 UTC, it would be something like 16 hundred hours for an 11am meeting, so "Does sixteen work for you?" or "Does sixteen hundred hours.." sounds a little odd.

"sixteen hundred" is how they say it in the US military.

Living in a country that uses the 24h system, you just say "four" or "4 o'clock", the time of day is understood from context 90% of the time. The other 10% you just add "in the morning" or "in the afternoon", or "16 hours".

"Sixteen hundred hours".

16 Hundred.