[Bilbo1967]

Originally Posted by HarryT

Yes, we'd say the same if we were using the 24h clock. In normal conversation, of course, we'd just say "one o'clock" and "five past one".

Originally Posted by Bilbo1967

If people are using the 24 hour clock (which wouldn't be usual in normal speech) I think it would be the same. Otherwise, that would be 1 'o' clock and 5 past 1.

Hmm...jinx!