Historical clue formulations

• Get a move on — 2021-10-17
• Speed up — 2021-01-02
• Swindle — 2020-10-03
• Really move — 2014-10-18
• Disco line dance — 2014-04-24
• 1970s dance craze — 2009-03-01
• Get the lead out — 2005-07-24
• Dance at 23-Down — 2004-04-06
• Sell aggressively — 2003-03-18
• 1975 craze, with "the" — 2000-08-05