Thinly slice the apple, pear, and orange. Place them into a medium bowl and stir in the sugar and cinnamon. Transfer to a large pitcher. Allow to stand for 20 minutes to allow the flavors to meld.
Pour in the red wine. Stir and refrigerate for 1 hour, or as long as 4 hours. (Don’t go beyond 4 hours or the fruit texture starts to degrade.)
To serve, fill a glass with ice. Fill halfway with sparkling apple cider or apple cider, then halfway with red wine mixture (or you can pour them both together in a pitcher). Garnish with cinnamon stick, rosemary or orange slices. When you’ve polished off the sangria, you can snack on the sweetened fruit.