Otra Ola is known as the place to buy Cinnamon Buns. What is all the hype about?? Cinnamon buns are a traditional Scandinavian pastry and even have their own special day (cinnamon bun day) coming up on 4 October. So what better way to brush up on your knowledge of the sweet and sticky bun, than by finding out a bit more about the history and why they're so popular, as well as how to celebrate the day and why the Swedes love their cinnamon buns so much! What are cinnamon buns?