Historical clue formulations

• On the right radio frequency — 2025-01-18
• Paying attention — 2024-06-25
• Up on things — 2013-10-20
• Hip (to) — 2009-10-01
• Hip — 2007-01-07
• Hip — 2005-03-05
• Au courant — 2004-02-08
• Listening — 1998-04-10
• Receptive — 1997-06-08