Upper Allen Township and Keystone Marker Trust, a non-profit organization, have collaborated to restore the historic Shepherdstown Keystone Marker located on the Gettysburg Pike.
Each NHL game features 60 minutes of playing time, broken down into three 20-minute periods. The league also mandates a 17-minute intermission after the first and second periods to flood and ice and provide the players with a rest period.
It's simple. In the NHL: The regulation time of a game is 60 minutes, broken down into three, 20 minute periods. With stoppage time (like when there is a face-off, penalty, fight, commercial, etc.) each period last about 40 minutes of real time.