Historical clue formulations

• Established fact — 2025-12-20
• Presumption, in math — 2011-08-11
• Accepted fact — 2009-03-15
• Like presents — 2006-02-20
• First, as a name — 2005-10-17
• Established fact — 1999-06-17
• Donated — 1999-05-16
• Assumed — 1998-12-22
• Starting point in decision making — 1998-11-10
• Taken for granted — 1998-07-15
• Postulate — 1994-02-17