Because of many requests, I decided to create an article on what you can get for free on your birthday in Toronto. Obviously, this list is not exhaustive and I only put the things that you can get for free straight away during your visit without conditions (need to bring guests, only discount...).
There are a few places where you only need to bring your ID to get a freebie:
Denny’s: get an Original Grand Slam breakfast.
Rainbow Cinema or Magic Lantern Theater: a free ticket. But watch out, sometimes this would not apply to all movies, call to check.
In Toronto, most of the places can offer you a birthday if you to sign up first. To be sure to obtain your freebie, register at least 1 week before your birthday.
Starbucks, but also all small cafe’s with a loyalty system like Page One for example.
Chatime: free drink.
Boston Pizza: free dessert, free pizza on registration birthday.
David’s Tea: free tea.
Harvey's: free burger.
Marble Slab Creamery: free ice cream.
My Panera: free pastry.
South saint burger: free burger.
W burger bar: free burger.
The works: free burger.
East side Mario: free dessert.
Benihana: 30 dollars to use at Benihana.
Taco bell: a free meal on your birthday.
On my birthday, I tested 4 of these things including free breakfast! It’s really worth it ;)