Historical clue formulations

• Perk from work — 2020-05-03
• 25-Down, notably — 2018-12-12
• Charity affair — 2015-06-12
• Fund-raising event — 2014-04-27
• Nonpaying gig — 2000-10-08
• Live Aid, e.g. — 1999-09-24
• Charity event — 1998-03-16
• Fund-raiser — 1994-04-18