Soda bread is best enjoyed the same day you bake it, but it can be stored in an airtight container at room temperature for 2 to 3 days. If you keep it for longer than 1 day, refresh it in a 300 degrees F oven for 4 to 5 minutes. Or you can freeze it, tightly wrapped in plastic, for up to 1 week and reheat it in a 300 degrees F oven for 10 to 12 minutes.