In Brazil we'll say things like "The party is at 8 da noite", where "da noite" means "at night". When context is obvious, we often ommit that, so I might say "W

In Brazil we'll say things like "The party is at 8 da noite", where "da noite" means "at night". When context is obvious, we often ommit that, so I might say "We will have lunch at 1 one clock" meaning 13h because it is obvious that no one has lunch at 1am. We will generally use 24h time in writing because we cannot control context, and in other situations where ambiguity cannot be avoided otherwise. To me the main advantage of 24h time is that it is easier to mentally calculate time, so for example 3 hours after 11:00 is just 11+3, which is 14:00h.