Math: Background on Measurement in Canada

The metric system was legalized in Canada, but the British imperial system continued to be used.

1871

Photo source: https://commons.wikimedia.org/wiki/File:Flag_of_the_United_Kingdom.svg Information sources for the entire timeline:
https://www.thecanadianencyclopedia.ca/en/article/metric-conversion
https://en.wikipedia.org/wiki/Metrication_in_Canada

Canada began changing from the imperial to metric system

1970

This was done by the Liberal government under Pierre Trudeau. Photo source: https://commons.wikimedia.org/wiki/File:Change-1080x675.jpg

Fahrenheit temperatures were replaced with Celsius temperatures.

1975

Photo source: https://commons.wikimedia.org/wiki/File:Thermometer_R.jpg

All speed limit signs in Canada were changed from miles/hour to kilometres/hour.

1977

The change occurred over the Labour Day weekend. Photo source: https://www.winnipegfreepress.com/our-communities/herald/Grassroots-group-calling-for-lower-speed-limits-574204661.html

The process of changing to the metric system was stopped.

1984

This happened because a new government, Progressive Conservatives led by Brian Mulroney, was elected. Photo source: https://commons.wikimedia.org/wiki/File:Stop-sign.jpg