Historical clue formulations

• Herculean tasks — 2026-08-26
• Works, works, works — 2025-06-29
• Herculean tasks — 2025-04-15
• Grinds away — 2024-06-11
• Herculean efforts — 2020-12-10
• A dozen for Hercules — 2015-10-18
• Sweats — 2013-12-01
• Exerts oneself — 2013-06-14
• Feats for Hercules — 2009-07-07
• Breaks one's back — 2008-08-23
• Doings of Hercules — 2004-02-25
• Challenges for Hercules — 2003-09-24
• Hercules had 12 — 2003-07-08
• Dwells on — 1998-12-12
• Plugs away (at) — 1996-11-01
• Hercules feats — 1994-10-02