A few people asked why the Oktoberfest starts in September. The story is complicated, particularly if you don’t already have an awareness of Bavarian history. People who are particularly interested can Google it, but I’ll try and provide a very simple answer.
The Oktoberfest in Munich is the original ‘Oktoberfest’. There are two big fairs/beer festivals in Germany that go on at the same time, one in Munich and one in Stuttgart. The one in Stuttgart actually started before the one in Munich and began as a harvest festival. It looks and feels similar to the Oktoberfest in Munich, but it isn’t officially called an Oktoberfest. The one in Munich is a little bigger and gets a more international audience, but both are fantastic events with their own pros and cons.
The Oktoberfest in Munich started off as a public wedding party when the king of Bavaria (King Ludwig) got married on 12th October 1810. Due to various circumstances Ludwig was forced to abdicate in 1848. By then the Oktoberfest had already moved away from being a party to celebrate the royal couple, and after a couple of years the Oktoberfest switched from wine (the drink you have at a royal wedding), to beer. After King Ludwig abdicated, the Oktoberfest became more distant from the ‘shamed’ king and at some point it was moved forward into September when the weather is typically better.