As I had indicated, Canada has not set a target for 2050. The government, with provinces and territories, in Vancouver in March 2016, affirmed a target and worked together through a very open and consultative process to develop a plan for how to attain that with those assumptions, in terms of the nature of the measures and their modelled impact provided in the report of the United Nations as well as in reporting to Canadians on an annual basis.
On June 5th, 2018. See this statement in context.