Historical clue formulations

• Pepsi or O.J. — 2013-02-19
• Drink, informally — 2004-02-01
• Drink: Abbr. — 1999-12-11
• O.J. or hot choc., e.g. — 1998-12-10
• Part of a restaurant bill: Abbr. — 1996-05-11
• Girl's nickname — 1994-12-31