Does anyone know when the 1911 census was taken in BC?

I have a relative who appears in BC in 1911. He is listed as married, but living apart from his wife and working as a cook. I can't find his wife, but its an often misspelled name. On March 30, 1911, she married another man and is listed as being a widow. I can't find a record for the husband's death. Was the census before March 30th?

thanks