To a large drink pitcher add the wine, 1 sliced pear, 1 sliced apple, and the cinnamon stick. Chill in the refrigerator for at least 4 hours and up to overnight.
When you're ready to serve, slowly stream the hard apple cider into the pitcher then stir gently to combine. Pour the sangria into glasses filled with ice, the reserved fruit cut into slices, and cinnamon sticks, if using, then serve.
