Historical clue formulations

• Glimmer — 2025-05-19
• Good thing to have in one's eye? — 2024-05-01
• Coruscate — 2023-12-01
• Twinkle — 2021-12-11
• Twinkle — 2015-05-19
• Shine — 2014-03-09
• Twinkle — 2013-07-07
• Scintillate — 2008-12-14
• Glimmer — 2008-11-18
• Flash of light — 2005-10-26
• Twinkle — 2005-09-14
• Shine — 2004-09-13
• Hint of light — 2004-03-03
• Shine — 2003-03-23
• Twinkle — 2002-07-26
• Faint flicker — 1998-12-22
• Flash of light — 1997-03-24