The first Wikipedia Day took place in Zurich. The choice was not accidental, because the presence of german speaking Swiss in Wikimedia CH is fundamental.
Also the meeting's place has not been accidental: the ETH Zurich. Wikipedia and Wikimedia, in fact, try to operate in the environment of traditional places of the culture and to have agreements and cooperations with universities and other educational organizations.
After the first Wikipedia Day, one decided to have more Wikipedia Days in other Swiss towns, in order to reach other linguistic parts of Switzerland, like Lugano.