Historical clue formulations

• Floated down a lazy river, perhaps — 2024-03-26
• Floated down a river, say — 2023-01-08
• Went leisurely downriver, perhaps — 2017-02-21
• Rode down a river, in a way — 2013-08-04
• Floated downstream, in a way — 2008-10-16
• Like most bicycle tires — 2004-10-31