Also, speaking of YYC, starting Thursday (Sept 18), they are renumbering all of the existing gates in preparation for the opening of the new terminal next year.
http://www.yyc.com/News/tabid/91/art...sy-as-ABC.aspx
The D gates are being re-assigned as A; B/C will just be B; and the current A gates will be C after the change. Other than the gate numbers, I don't think anything else is changing.