I think international tourneys have 10min overtime.Hmm... I'm going to blame spending the last 4 days on bottle feeding a kitten when not at work... but wasn't 10 minutes of 4on4 what we used to have?
Nhl has had 5 min ot since 2001 iirc.
Edit: 1983 was the move to introduce overtime in the regular season. It has always been five mintes.
In 2000, they added the rt point (aka loser point)
And in 2005 they introduced the shootout.