Historical clue formulations

• What phone books are alphabetized by — 2017-04-11
• It may be changed at the altar — 2003-10-04
• Part alphabetized in a telephone directory — 2003-04-28
• Sorting criterion — 2003-02-15
• Parents pass it on — 2002-06-15
• Washington or Irving — 2000-01-17
• 1-Across or 55-Across, e.g. — 1997-08-28