Historical clue formulations

• "I've got half ___ to ..." — 2014-04-20
• Start of the United Negro College Fund slogan — 2014-03-30
• Start of the United Negro College Fund slogan — 2009-08-20
• "I have half ___ to..." — 1997-05-21
• "___ is a terrible thing to waste" — 1996-09-23