Pierce squash with knife in several places to allow steam to escape. Place on microwavable paper towel in microwave oven. Microwave uncovered about 5 minutes or until squash feels warm to the touch. Cut in half; remove seeds.
In shallow microwavable dish, place squash halves, cut sides down. Cover with microwavable plastic wrap, folding back one edge or corner 1/4 inch to vent steam. Microwave on High 5 to 8 minutes, rotating dish every 2 minutes, until tender. Let stand 5 minutes.
In small bowl, mix remaining ingredients. Turn squash cut sides up. Spoon date mixture into centers of squash. Microwave uncovered on High about 1 minute or until sugar is melted. Cut each squash half into 2 serving pieces.