Creating Festive Cinnamon Swirl Eggnog Bread Pudding is simple if you follow these easy steps:

1. Preheat the Oven: Preheat your oven to 350°F (175°C) and grease a 9×13-inch baking dish.
2. Prepare the Bread: In a large bowl, add the cubed bread and set aside.
3. Mix the Custard: In another bowl, whisk together the eggs, eggnog, whole milk, granulated sugar, vanilla extract, ground cinnamon, ground nutmeg, and salt until well combined.
4. Combine: Pour the custard mixture over the cubed bread, ensuring all pieces are soaked. Allow it to sit for about 10 minutes so the bread absorbs the liquid.
5. Create Cinnamon Swirl: In a small bowl, mix the brown sugar and ground cinnamon. Sprinkle this mixture over the soaked bread evenly.
6. Fold in the Swirl: Gently fold the bread and cinnamon mixture together to create swirls, but be careful not to overmix.
7. Transfer to Baking Dish: Pour the mixture into the prepared baking dish, spreading it evenly.
8. Bake: Place the baking dish in the preheated oven and bake for 45 minutes, or until the top is golden brown and a knife inserted in the center comes out clean.
9. Cool: Remove from the oven and let it cool for about 15-20 minutes before serving. This allows the pudding to set and makes it easier to slice.
10. Serve: Cut into squares and serve warm, optionally with whipped cream or a scoop of vanilla ice cream on top.

These straightforward steps will guide you in creating a delightful Festive Cinnamon Swirl Eggnog Bread Pudding that will surely impress your guests.