Historical clue formulations

• Get down — 2022-08-05
• Bum out — 2021-12-26
• Bring down — 2020-08-30
• Make blue — 2018-04-16
• Make melancholy — 2015-08-31
• Depress — 2010-12-05
• Get down — 2008-05-31
• Deflate, in a way — 2000-11-23
• Turn blue? — 1995-05-07