Put the dates in a small bowl and sprinkle with the warm water. Let soak for 5 minutes to soften, then drain.
In a blender, combine the dates, almond milk, yogurt, banana, ice cubes and the 1/8 teaspoon nutmeg. Blend until smooth and frothy, about 30 seconds.
Pour into tall, chilled glasses and garnish each with a dusting of nutmeg.