September 2019 - Canada lifted the visa requirement for Mexicans and has kept this status to this day.
December 28, 2018 - Mexico is listed is the visa-free category. - Entry Requirements by country/territory - Immigration and Citizenship Canada
June 28, 2016 - "Canada will lift its visa requirements for travellers from Mexico as of Dec. 1, Prime Minister Justin Trudeau announced following his bilateral talks with Mexican President Enrique Pena Nieto in Ottawa Tuesday." - Canada drops Mexican visa requirement, Mexico lifts beef ban - CBC
January 29, 2016 - "Canada’s Foreign Minister Stéphane Dion said Friday a long-standing dispute with Mexico over visa restrictions would be resolved shortly. Mr. Dion made the remarks at a news conference following a meeting in Quebec City with U.S. Secretary of State John Kerry and Mexican Foreign Minister Claudia Ruiz Massieu." - Canada to Resolve Visa Impasse With Mexico - The Wall Street Journal
November 17, 2015 - "Olivier Duchesneau, the deputy director of communications for Trudeau, could not say when Mexicans would be able to travel to Canada without a visa, but told CBC News by phone today that the prime minister had instructed members of his cabinet to move forward with the change." - Justin Trudeau formally commits to lifting visa requirement for Mexicans - CBC
November 15, 2015 - "Prime Minister Justin Trudeau met today with President Enrique Peña Nieto of Mexico, on the margins of the G20 Summit in Turkey. [...] Prime Minister Trudeau reiterated the platform commitment to lift the visa requirement on Mexican citizens." - Prime Minister Justin Trudeau meets with President Enrique Peña Nieto of Mexico - Justin Trudeau, Prime Minister of Canada