Historical clue formulations

• Very cold — 2025-06-24
• Frozen — 2023-01-09
• Freezing — 2022-08-30
• Beyond cold — 2021-10-03
• Very cold — 2020-11-29
• Extremely cold — 2020-10-14
• Extremely cold — 2020-04-03
• Icy — 2017-10-07
• Quite cold — 2012-11-20
• Frosty — 2012-06-30
• Very cold — 2012-06-26
• Icy cold — 2012-04-09
• Icy — 2009-08-30
• Icy cold — 2006-11-27
• Very cold — 2004-12-08
• Not just cool — 2003-10-10
• Freezing — 2002-12-19
• Shiver-inducing — 2002-10-25
• Arctic — 2000-05-27
• Icy — 1998-03-26
• Arctic — 1997-03-29
• Very cold — 1995-11-18
• Icy — 1995-08-04
• Extremely cold — 1995-06-13