Expo 2015 was a World Expo hosted by Milan, Italy. It opened on May 1 at 10:00 CEST and closed on October 31. Milan hosted an exposition for the second time; the first was the 1906 Milan International.

A world's fair, also known as a universal exhibition or an expo, is a large global exhibition designed to showcase the achievements of nations. These exhibitions vary in character and are held in different parts of the world at a specific site for a period of time, typically between three and six months.