From a previous post:
Some history on how "Dominion Day" was dumped in favour of the meaningless "Canada Day":
... In hindsight, it was a case of identity theft, an act of historical vandalism. A quarter-century ago, 13 members of Parliament hastily -- some say indecently -- renamed the country's national birthday in a swift bit of legislative sleight-of-hand.
At 4 o'clock on Friday, July 9, 1982, the House of Commons was almost empty. The 13 parliamentarians taking up space in the 282-seat chamber ... The whole process took five minutes. ... a private member's bill from Hal Herbert, the Liberal MP from Vaudreuil ...
And here are Mark Steyn's 2015 reflections on the subject:
... let me salute Canada's Conservative government for taking a tonally mature and historically honest approach to this country's nationhood.
... the usual [Liberal] guff about "what a young nation we are". We're not. We're one of the oldest continuous constitutional orders on earth, and there was always something queasily totalitarian about Liberal propagandists' insistence that Canada didn't exist until M Trudeau moved into Sussex Drive.
... Mr Harper does not share that view. ... Canada's citizenship ministry even hands out copies of Magna Carta to new arrivals - which in this 800th anniversary year is even more heartening. So I'm glad we're reconnecting with the half-a-millennium of history the Trudeaupians tried to bury.
... I shall always be grateful to Mr Harper's ministry for giving us a decade-long respite from all that Trudeaupian eternal-youth gibberish.