Historical clue formulations

• Open acknowledgment — 2023-02-26
• Profession — 2021-04-04
• Declaration — 2020-12-02
• Statement of affirmation — 2019-12-02
• Declaration — 2019-09-08
• Affirmation — 2009-10-21
• "I do," e.g. — 2007-09-27
• Frank acknowledgment — 1999-08-16
• Statement of belief — 1998-09-03
• Asseveration — 1998-07-02
• Promise — 1997-10-14
• Pledge — 1996-05-14
• Statement — 1995-05-28
• Declaration — 1994-05-11