What is the name of the flag used before the maple leaf flag?

The flag used before the current Canadian maple leaf flag is known as the "Red Ensign." This flag was used as Canada's national flag from 1868 until 1965, primarily during the time when Canada was still a dominion within the British Empire. It featured a Union Jack in the canton and the Canadian coat of arms on a red field. The maple leaf flag was adopted on February 15, 1965, and is now Canada's official national flag.