Oktoberfest
At the beginning...
...it all started with wedding bells and a horse race.
October 12, 1810, four years after Bavaria had become a kingdom, crown prince Ludwig of Bavaria (who was to be King Ludwig I) married princess Therese of Saxon-Hildburghausen. The official festivities lasted five days and included parades of riflemen, music, eating and drinking. The festivities ended with a horse race held on a green which was situated in those days outside of the city limits and named "Theresienwiese" (Theresa's green) in honour of the bride. Over the next years the horse race was repeated and the Oktoberfest, also called "Wiesn" was born.
Referring to the information of the tourist information Munich there are dates like followed up to 2011: