Historical clue formulations

• Prom wear — 2019-10-25
• Evening wear — 2016-08-10
• They might come with trains — 2014-12-05
• Graduation attire — 2014-11-13
• Fancy dresses — 2013-10-28
• Red-carpet interview topics — 2013-06-21
• Ball coverings? — 2012-11-11
• Graduation attire — 2010-12-28
• Prom apparel — 2005-04-20
• Prom needs — 1999-12-19
• Habits of a sort — 1994-06-17