At Birmingham New Street railway station some time in the seventies, awaiting train to Bristol after a long day of meetings.
Company Director No. 1 (64): I thought you said the train left at 22:22
Company Director No. 2 (44): No, it arrives at 22.22, I said it leaves here at twenty-to-eight.
... No. 1: That's what I SAID. On the 24-hour clock twenty is eight.
... No. 2: No (slowly). It leaves here at 19:40 and arrives at Temple Meads, Bristol, at 22:22.
...No. 1: That's after 10 on the 24 hour clock - you young fellows don't understand the 24 hour clock, you had to know it during the war, you know.
... No. 2: Mmm.