According to Wikipedia
"One of sports' oldest and most recognizable logos, the classic 'C' and 'H' of the Montreal Canadiens was first used together in the 1917-18 season before evolving to its current form in 1952-53. The 'H' does not stand for 'Habs' or Habitants, as this is a misconception stemming from an error by an English language newspaper reporter in the 1950s. It actually stands for 'Hockey', as in 'Club d'e Hockey Canadien', the official name of the team.