Believe that by the time your car was made (depending on who made the wheel) the dates on some moved to around the valve stem area.
Through the years there are examples on the face of the center section, on the outside surface of the rim and near the valve stem. So those would be a good place to start the search and get a few good pictures so we can see what your working with
Stampings information can include maker mark, size of wheel, year, month and even day
May find MADE IN CANADA on some wheels