Agree with above - usually its 'half past one', 'six-twenty', 'twenty to four'
Whatever happened to 'O´Clock'?
Suspect writers of historical fiction could trip up here.
Found an interesting link:
http://www.randomhouse.com/wotd/inde...?date=19970102
(Sorry - I am 'new' around here and it looks like I only read the first page of this thread! Didn't realise the thread had moved on.
)