Oktoberfest is the world's largest Volksfest. Held annually in Munich, Bavaria, Germany, it is a 16- to 18-day folk festival running from mid or late September to the first weekend in October, with more than 6 million people from around the world attending the event every year. Locally, it is often called the Wiesn, after the colloquial name for the fairgrounds, Theresa's Fields. The Oktoberfest is an important part of Bavarian culture, having been held since the Middle Ages. Other cities across the world also hold Oktoberfest celebrations that are modelled after the original Munich event.
The Munich Oktoberfest originally took place in the 16-day period leading up to the first Sunday in October. In 1994, this longstanding schedule was modified in response to German reunification. As such, if the first Sunday in October falls on the 1st or the 2nd, then the festival would run until October 3. Thus, the festival now runs for 17 days when the first Sunday is October 2 and 18 days when it is October 1. In 2010, the festival lasted until the first Monday in October (October 4), to mark the event's bicentennial.