Historical clue formulations

• Ruby lookalike — 2026-02-15
• Deep red — 2025-01-31
• Birthstone for a January baby — 2024-11-25
• Dark red gemstone — 2020-07-10
• January birthstone — 2019-12-12
• Red stone — 2015-06-24
• Red shade — 2013-12-28
• January birthstone — 2010-10-03
• Deep red — 2010-04-02
• January birthstone — 2007-12-11
• Relative of cerise — 2001-02-15
• January's birthstone — 2000-05-15
• Abrasive mineral — 1994-10-08