I was working in Bavaria and we were to meet senior guys from a large British manufacturing company to demo them a system. They arrived late on a Saturday towards the end of September so we planned to show then around the system on Sunday for an hour or two then take them on a tour around the little provincial German town where we were based.
Then discovered that Bavaria had strict Catholic working hours rules and before anyone could enter the company building on a Sunday, a regional minister had to sign it off.
It turned out that the Sunday was the opening day of Oktoberfest. Regrettably we had to take the 2 hour train Journey to Munich and spend the day there with our customers.