Historical clue formulations

• Seltzer, e.g. — 2017-06-09
• Event for meeting new people — 2017-03-27
• First-week-of-school social event — 2014-09-02
• Soda, at times — 2014-05-23
• The 7-Up in a 7 and 7 — 2008-08-04
• 7-Up, sometimes — 2003-04-09
• Social — 2003-03-05
• Recording studio apparatus — 2001-04-10
• Coke, sometimes — 1998-08-30
• Boy-meets-girl event — 1998-05-10
• Kitchen appliance — 1996-09-02
• Social — 1995-07-28
• Party — 1994-02-25