Historical clue formulations

• Keep cruising, say — 2026-02-01
• 1979 Commodores hit with the lyric "Good times never felt so good" — 2021-12-12
• Longfellow's words before "O Ship of State!" — 2011-04-10
• Poetic command before "O Ship of State!" — 2005-01-24
• Longfellow's words before "O Ship of State!" — 2001-10-07
• Order to the "Ship of State" — 1996-12-22