Historical clue formulations

• Christmas carol title starter — 2023-09-30
• "___, all ye faithful" — 2020-09-06
• "___, All Ye Faithful" — 2019-08-12
• Carol opener — 2015-10-22
• Christmas carol starter — 2014-02-12
• Start of a carol — 2012-02-28
• Noel starter — 2011-05-29
• Carol start — 2011-01-02
• Carol opener — 2009-01-04
• Carol starter — 2005-06-14
• Start of a Christmas song — 2000-10-11
• Entreaty to "all ye faithful" — 2000-02-21