The province of Manitoba was created by The Manitoba Act, which received royal assent on May 12, 1870, and was officially incorporated into Confederation on July 15 that year—the only to enter Confederation under Indigenous leadership (that of Louis Riel).
[1] Nearly a century later, Manitoba's official flag was dedicated and raised for the first time on May 12, 1966.
Celebrations on May 12 began to grow into an annual community event since the province's centenary in 1970.
[6] May 12, 2020, marked the 150th anniversary of Manitoba's founding; accordingly, commemorative events, activities, projects, initiatives, and so on were planned to take place throughout 2020 under the banner of Manitoba 150 (#MB150).
[9] A substitute Manitoba Day was celebrated in Vancouver during the 2010 Winter Olympics on February 25, 2010.