Historical clue formulations

• Longtime buddy — 2024-11-03
• Longtime friend — 2022-11-28
• Childhood friend — 2022-06-05
• School chum, say — 2017-01-22
• Longtime ace — 2012-05-05
• One singing "Those Were the Days"? — 2007-12-13
• Friend since high school, say — 2007-06-05
• Buddy from way back — 2005-06-07
• Longtime buddy — 2004-03-22
• Chum from way back — 2000-05-24