Historical clue formulations

• Teammate of Cupid in "A Visit From St. Nicholas" — 2026-02-13
• One on Santa's team — 2025-09-09
• Epiphany that precedes a major change — 2024-07-18
• Existential threat in 2021's "Don't Look Up" — 2024-04-14
• Ajax competitor — 2023-10-13
• Flier with a tail — 2021-12-14
• One might fly close to the sun — 2021-12-04
• Competitor of Ajax and Bon Ami — 2021-08-31
• One of Santa's reindeer — 2015-09-16
• Heavenly body with a tail — 2015-03-16
• Cupid's teammate — 2014-10-10
• Halley's ___ — 2013-04-15
• Astronomer's sighting — 2013-02-28
• Bon Ami competitor — 2012-12-11
• "Deep Impact" menace — 2012-09-13
• One of Santa's team — 2011-09-18
• Cleanser with the old slogan "Nothing can hold a can to ..." — 2011-07-19
• Cupid's teammate — 2010-02-21
• Streaker seen at night — 2009-04-02
• Cleaning brand — 2003-12-25
• Rival of Ajax — 2002-02-10
• Bill Haley bandmate — 2001-08-01
• Streaker in the night sky — 2001-01-15
• Doomsday cause, maybe — 1998-06-16
• Kitchen cleanser — 1998-05-18
• Hale-Bopp, e.g. — 1997-05-14
• Procter & Gamble brand — 1996-03-14
• Celestial firework — 1995-07-16