Historical clue formulations

• Close-fitting headwear — 2025-02-13
• Accessory worn with goggles — 2023-06-30
• Part of Waldo's wear in "Where's Waldo?" — 2014-09-03
• Top of a mountain? — 2014-08-19
• Snow cap? — 2012-11-18
• Top of a slope? — 2008-03-15
• Top of the Alps? — 2004-02-26