DL should be open from 8-midnight and DCA from 10-10. Fantasmic is at 9 and 10:30. Parades in DL are usually 3:30 and 7. Block Party at DCA is usually around 5:30 in the summer and the Electrical parade is at 8:45. Fireworks are at 9:25.
For many years DL stayed open from 8AM until midnight from about July 1 until late August. Last summer DL started closing at 11PM on weeknights, but still midnight on weekends.