When did canada change from miles to kilometers?
Metrication in Canada began in 1970 and while Canada has converted to the metric system for many purposes, there is still significant use of non-metric units and standards in many sectors of the Canadian economy and everyday life today. This is mainly due to historical ties with the United Kingdom, the traditional use of the imperial system of measurement in Canada, proximity to the United States, and to public opposition to metrication during the transition period.
When did Metrication begin in Canada?
1970
Metrication in Canada
No context provided
When did Metrication cease in Canada?
1985
Metrication in Canada
https://en.wikipedia.org/wiki/Metrication%20in%20Canada
Metrication in Canada began in 1970 and ceased in 1985. 
Metrication in Canada
During the Labour Day weekend in 1977, every speed limit sign in the country was changed from mph to km/h. From the same time every new car sold had to have a speedometer that showed speed in km/h and distance in km. The distances on road signs were changed to kilometres during the next few months.
Metrication in Canada
Metrication in Canada began in 1970 and ceased in 1985. While Canada has converted to the metric system for many purposes, there is still significant use of non-metric units and standards in many sectors of the Canadian economy and everyday life today. During the Labor Day weekend in 1977, every speed limit sign in the country was changed from mph to km/h. From the same time every new car sold had to have a speedometer that showed speed in km/h and distance in km. The distances on road signs were changed to kilometers during the next few months.