Expo 67

The 1967 International and Universal Exposition, commonly known as Expo 67, was a general exhibition from April 28 to October 29, 1967. It was a category one world's fair held in Montreal, Quebec, Canada. It is considered to be one of the most successful world's fairs of the 20th century with the most attendees to that date and 62 nations participating. It also set the single-day attendance record for a world's fair, with 569,500 visitors on its third day.