10 weeks! We got engaged in Sep 04 and married in Nov04. My mum was terminally ill and we wanted o get married before she was too ill to be there. However, it would have been a quick engagement even if that hadn't been the case.
It was loads of time! We got married in Edinburgh, had a meal for about 25 and then a reception for about 100. The only problem was discovering that the band thought they had a booking for Nov 05! Got it all sorted though.