Historical clue formulations

• Deep sleep — 2026-04-29
• Lethargy — 2025-11-30
• Abnormally deep sleep — 2024-11-21
• Abnormally deep sleep — 2024-05-08
• Extreme lethargy — 2023-12-10
• Lethargy — 2010-07-09
• Lethargy — 2007-09-14
• Deep sleep — 2004-12-30
• Rip Van Winkle's state — 2003-10-24
• Lethargy — 2000-03-12
• Deep sleep — 1999-07-08
• Deep sleep — 1998-04-02
• Deep, unnatural sleep — 1998-01-25
• Lethargy — 1997-08-26
• Deep sleep — 1996-12-20
• Lethargy — 1995-12-02