The longer you let this sangria sit, the more these fruity flavors have a chance to meld with one another, making for a bolder, tastier drink.
Place apples in a large chilled glass pitcher. Add juices, Calvados (if using), water or seltzer, and wine; stir. Cover and refrigerate for 2-4 hours. Remove from fridge. Fill 6 glasses halfway with ice cubes; add 1 1/4 cups sangria with fruit.