Historical clue formulations

• Rudolph's quirk-turned-perk — 2025-04-28
• Prominent feature of Rudolph — 2024-12-22
• Rudolph's signature feature — 2023-11-11
• Item sported to support Britain's Comic Relief — 2009-12-19
• Cold shower? — 2009-07-09
• Cold symptom — 2006-12-01
• Rudolph's feature — 2005-10-09
• Christmas light? — 2005-06-10
• Cold development — 1999-09-05
• Christmas light? — 1996-12-06