Hockey Fact of the Day!
In the early days of hockey, games had two 30-minute halves instead of three periods. The switch to three 20-minute periods was made before the 1910-11 season.
From The Ultimate Book of Hockey Trivia for Kids. Text copyright © 2006, 2008, 2009, 2011, 2015 by Eric Zweig. Illustrations copyright © 2006, 2008, 2011 by Scholastic Canada Ltd.