From a Quebecois television forum, someone posted a sample week of schedules for CBFT, the Radio-Canada flagship in Montreal, for each year from 1973 to 1982. Each year featured a week in September, except for 1978, which was the first week in October:
http://emissionsenfance.forumgratuit.ca/t45-cbft-2-montreal-src-horaires-d-automne-1973-1982
http://emissionsenfance.forumgratuit.ca/t45-cbft-2-montreal-src-horaires-d-automne-1973-1982