I don't and never have set out to fast for a particular time. It just happens that I don't eat, because I'm not hungry. That often means I don't eat for around 18-20 hours, sometimes 24. So I eat when and as often as I want to, but the gap between meals is usually quite long.
On most days I won't eat anything until 1.30 or 2pm and then it will be cheese, ham, olives, that sort of thing. Substantial evening meal around 7 or 7.30.