Historical clue formulations

• First word in Yale's motto — 2020-01-25
• Start of Yale's motto — 2018-03-11
• "___ et veritas" — 2017-05-07
• Latin word shared by the mottoes of Yale and Tufts — 2015-11-25
• Illumination unit — 2013-03-17
• Unilever soap brand — 2010-07-29
• Meter-candle — 2009-05-20
• Fiat ___ (common university motto) — 2008-06-18
• Competitor of Dove or Camay — 2008-04-07
• Illumination unit — 2007-04-23
• Unilever soap brand — 2007-04-10
• Unilever soap brand — 2007-01-15
• Lever Bros. brand — 1999-09-11
• Soap brand since 1899 — 1999-04-27
• Neighbor of Ger. — 1998-07-08
• University motto word — 1995-08-24