Historical clue formulations

• Freeze over — 2024-12-10
• Get slick, in a way — 2023-01-27
• Freeze over — 2022-07-27
• Coat in the winter — 2021-04-03
• Freeze — 2020-02-07
• Become slick, in a way — 2019-11-03
• Freeze over, as a windshield — 2018-09-05
• Acquire a winter coat? — 2018-06-25
• Freeze over — 2018-04-03
• Freeze over, as airplane wings — 2017-08-14
• Freeze — 2017-06-05
• Glaciate — 2017-02-19
• Freeze — 2016-07-15
• Freeze — 2009-06-27
• Put on a winter coat? — 2008-11-27
• Freeze over — 2008-09-10
• Become blocked, in a way — 2008-06-29
• Freeze — 2008-04-27
• Get slippery, in a way — 2008-03-01
• Freeze over — 2004-02-17
• Become slippery, in a way — 2000-01-05
• Glaciate — 1998-06-19
• Freeze — 1997-03-19
• Become frozen — 1995-12-25