What event is the wedding couple portraying that routinely occurs in a regular game of ice hockey?

In the regular game of ice hockey, the correct term for the description portrayed by the wedding couple in the picture is a face-off.

A face-off is a common occurrence in the game and a method to begin play where two players for opposing teams line up in front of each other and will compete for possession of the puck after the official drops it between them on the circle shown in the picture on the ice surface.

Usually the players called centers will line up against each other to start the game. A face-off takes place at center ice to begin the game; to start each of the 3 regular periods of play; and after one of the teams score a goal to restart play.

There are other circumstances when a face-off will occur plus other locations on the ice surface when a face-off takes place based on the rules of the game. Examples include when infractions in the game occur, including offsides, icing or when play is stoped due to a penalty being assessed to a player or players.

Another contemporary situation when a face-off occurs to restart play, is due to television commercials that are held throughout the broadcast of a game.

Rule 613 called Face-Off Procedures, includes other requirements that are part of a face-off. An example: players will stand squarely facing their opponents end of the rink and clear of the ice markings. The stick blades of both players shall be in contact with the nearest white area of the face-off spot and clear of the center red area.