Historical clue formulations

• Motorcyclist's invitation — 2026-05-05
• Board a moving vehicle — 2020-04-01
• Biker's invitation — 2017-08-03
• Motorcyclist's invitation — 2016-03-20
• Board, informally — 2013-04-04
• Cyclist's offer — 2011-12-25
• Board — 2010-12-05
• Biker's invitation to a friend — 2010-11-03
• Motorcyclist's invitation — 2007-04-24
• Biker's invitation — 2003-01-24
• Board, as a trolley — 1997-01-06