From January to December 2014 the total number of posts that have talked about Expo written in Italian were nearly one million , with a peak in May (over 192 000 post ) and July ( almost 102 thousand ) . The May 13, 2014 with over 25 000 mentions , the single day during the year when it is most discussed Expo2015 . Emerges from an analysis of the Chamber of Commerce of Milan through VOICES from the Blogs , spin off of the University of Milan , made of about a million comments on the Net in 2014 , about 90 thousand in December. The optimism in December, equal to that of the allocation in April 2012. If we consider the trend of the sentiment , the lowest point has had in May ( positive sentiment : 60.2 % ) . From July onwards , however, the sentiment showed a strong growth that has touched in November, the highest point ( 79.4 % in Italy and 78.6 % in Milan ) , as it continues to December ( 75.1 % in Italy , 76.7 % in Milan ) . We return to the levels of optimism of the time of allocation ( 69% in Italy , in Milan on 78 % in April 2012 ) .