The 1967 International and Universal Exposition or Expo 67, as it was commonly known, was the general exhibition, Category One World's Fair

World's Fair

World's fair, World fair, Universal Exposition, and World Expo are various large public exhibitions held in different parts of the world. The first Expo was held in The Crystal Palace in Hyde Park, London, United Kingdom, in 1851, under the title "Great Exhibition of the Works of Industry of All...

 held in Montreal

Montreal

Montreal is a city in Canada. It is the largest city in the province of Quebec, the second-largest city in Canada and the seventh largest in North America...

, Quebec

Quebec

Quebec or is a province in east-central Canada. It is the only Canadian province with a predominantly French-speaking population and the only one whose sole official language is French at the provincial level....

, Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, from April 27 to October 29, 1967. It is considered to be the most successful World's Fair of the 20th century, with the most attendees (50 million visits) to that date and 62 nations participating. It also set the single-day attendance record for a world's fair, with 569,000 visitors on its third day.

Expo 67 was Canada's main celebration during its centennial year

Canadian Centennial

The Canadian Centennial was a year long celebration held in 1967 when Canada celebrated the 100th anniversary of the Canadian Confederation. Celebrations occurred throughout the year but culminated on Dominion Day, July 1. 1967 coins were different from previous years' issues, with animals on each...

.