Preheat the oven to 350 degrees. In a small bowl, combine flour, baking powder, baking soda, salt, and cinnamon. Set aside.
In a larger bowl, beat butter until creamy.
Gradually add sugars and beat until light and airy.
Beat in eggs, one at a time.
Add sour cream and vanilla and mix until well combined.
Stir in flour mixture until just combined. Avoid over mixing.
Gently fold in strawberries.
Pour into a greased bread pan and bake for 60-65 minutes in the center of the oven.