So what EXACTLY is Canada Day?  What is the big deal?  The concert, parade, car show and all the flags flying?  And everything closed on a Tuesday, mid week?

Well, WIKI says:

Overview

Canada Day, celebrated annually on July 1st, commemorates the anniversary of the British North America Act, which in 1867, united three separate British colonies into the single nation of Canada. Initially known as Dominion Day, the holiday was renamed Canada Day in 1982 when Canada achieved full legal independence from the United Kingdom. 

Here’s a more detailed breakdown:

• Confederation:
  The British North America Act (now known as the Constitution Act, 1867) officially created the Dominion of Canada on July 1, 1867. This act brought together the colonies of Nova Scotia, New Brunswick, and the Province of Canada (which was later divided into Ontario and Quebec). 
• Independence:
  While Canada became a self-governing dominion in 1867, it wasn’t until the Canada Act of 1982 that it achieved full legal autonomy and severed ties with the British Parliament. 
• Celebrations:
  Canada Day is a federal statutory holiday and is celebrated with various festivities, including parades, fireworks, concerts, and community gatherings. Canadians often display the Canadian flag and wear the national colors, red and white. 

Significance:
Canada Day is a day for Canadians to celebrate their country’s history, culture, and achievements, as well as to reflect on what it means to be Canadian. The holiday also serves as a reminder of the ongoing process of nation-building and the importance of inclusivity and diversity. 

So, there you have it.  Like our 4th of July, which is in two days.