Preheat skillet over medium heat on the stovetop or a griddle to 350 degrees F. Combine the eggs, egg nog, sugar, vanilla, nutmeg and cinnamon in a large bowl. Mix well and pour into a shallow dish (9×13 or comparable).
Two pieces at a time, immerse the bread in the egg mixture so both sides are covered. Cook on each side for 4 to 5 minutes or until crispy. Repeat with remaining bread slices. Cover to keep warm and serve with butter and syrup!