Historical clue formulations

• Threw, as a party — 2020-12-15
• Had people over for dinner, say — 2019-08-06
• Entertained — 2005-03-22
• Emceed — 2004-02-10
• Like some Web forums — 2003-10-18
• Made introductions, maybe — 2000-03-05
• Presided over — 1995-01-07