Historical clue formulations

• Middle-of-the-night woe — 2026-02-15
• Trouble with Z's? — 2026-02-08
• A good cure for it is sleep, per W. C. Fields — 2016-05-07
• People with this don't go out for very long — 2009-04-09
• Red-eye cause — 2007-12-09
• Up state? — 2002-10-11
• Difficulty with Z's? — 2002-05-19
• Condition sometimes treated by hypnosis — 1999-09-11
• Sometime woe for Thurber — 1996-06-22