The 2008 CFL season was the 55th season of modern Canadian professional football. Officially, it was the 51st season for the league. It was also the first CFL season in which all of the league's regular season and post-season games, including the Grey Cup game, were aired on TSN. This meant the CFL was no longer aired on broadcast television in Canada. As of 2008, TSN was available in approximately 8.8 million of Canada's 13 million households.Montreal hosted the 96th Grey Cup at Olympic Stadium on November 23, when the championship was won by the Calgary Stampeders.

On February 21, 2008, the CFL announced the game schedule for the 2008 season. It was a 19-week schedule that included 18 regular-season games and one bye week for each team. Bye weeks were taken consecutively by each division, beginning with the West in Week 8, thus creating two weeks of divisional rivalry games.

The regular-season schedule began on Thursday, June 26, with an East-West double-header. For the first time since 1977, the season opener took place at Hamilton's Ivor Wynne Stadium, with the host Tiger-Cats losing to the Montreal Alouettes 33–10. The second game of the double-header saw the Calgary Stampeders at home, where they prevailed 28–18 over the BC Lions. The Toronto Argonauts opened by beating the host Winnipeg Blue Bombers 23–16 the following night, and the Saskatchewan Roughriders defeated the Edmonton Eskimos, in Regina, by a score of 34–13 on June 28.

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