Great Canadian Flag Debate on December 15, 1964. It resulted in the adoption of the "Maple Leaf" as the Canadian national flag. The flag was inaugurated on February 15, 1965, and since 1996, February 15 has been commemorated as National Flag of Canada Day. For much of its post-Confederation history, Canada used both the Royal Union Flag (Union Jack) as its national flag, and the Canadian Red Ensign as a popularly recognized and distinctive Canadian flag. The first Canadian Red Ensigns were used in Prime Minister Sir John A. Macdonald's time. The Governor General at the time of Macdonald's death, Lord Stanley, wrote to
Great Debate (astronomy) took part in a joint discussion that evening. Much of the lore of the Great Debate grew out of two papers published by Shapley and by Curtis in the May 1921 issue of the "Bulletin of the National Research Council". The published papers each included counter arguments to the position advocated by the other scientist at the 1920 meeting. In the aftermath of the public debate, scientists have been able to verify individual pieces of evidence from both astronomers but on the main point of the existence of other galaxies, Curtis has been proven correct. Shapley was arguing in favor