Did someone say 'free cheeseburger'!? McDonald's Canada put on their Snapchat that you will be able to get a free cheeseburger with any purchase on September 18th.
Claiming this offer is easy. Install the My McDonald's App via the link above, and on September 18th you will notice a coupon in the "my offers" section for a free cheeseburger. This offer states it is valid with any purchase at participating McDonald's restaurants, so you could buy yourself a pop and get lunch for free.
Sounds like a deal to me! This offer is to celebrate National Hamburger Day, so I assume it will be valid nation-wide.