Historical clue formulations

• Unfortunate accident — 2025-12-23
• Unfortunate incident — 2024-08-13
• Unlucky accident — 2024-02-29
• Minor snafu — 2023-10-09
• Minor accident — 2022-01-16
• Unfortunate event — 2020-10-17
• Cause of a small setback — 2020-07-12
• Minor accident — 2020-03-30
• Event that's an "Oops!" — 2019-07-29
• Bit of bad luck — 2014-05-14
• Fender bender, e.g. — 2009-02-24
• Tough luck — 2004-03-21
• Accident — 1999-04-25
• Bit of bad luck — 1997-05-02
• Small disaster — 1995-09-01
• Bad luck — 1993-12-17