1901 census has her being born Dec. 1. Since all of their names are in the 1901 census, but not in the 1911 census, it appears that they moved away from Manitoba afer that time. In the 1901 census, they also had another person living with them named David William Mitchell, age 53, listed as a domestic.
Marriage date/place info from Manitoba Vital Statistics marriage record.
Note that on her daughter’s birth record from Manitoba Vital Statistics, her maiden name is listed as Margaret Elenor Hunt. A second registration (with birthplace listed as RM of Pembina), shows her name as Maggie Hunt.
There is a Vital Statistics death record for Margaret Ellen Stevens (her married name) that I am taking her death date from; my original information had 1937, not 1927.