Historical clue formulations

• Got hip, with "up" — 2021-01-24
• Caught on, with "up" — 2016-09-18
• Smartened (up) — 2008-12-03
• Got smart, with "up" — 2000-08-22
• Got hip, with "up" — 1998-07-10
• Smartened (up) — 1998-02-27