Historical clue formulations

• U.P.S. deliveries: Abbr. — 2014-01-11
• They may hold many pks. — 2011-03-04
• Milk holders: Abbr. — 2010-02-12
• Stack on a pallet: Abbr. — 2007-07-06
• Cig. purchases — 2006-05-21
• Egg holders: Abbr. — 2006-05-11
• Cig. boxes — 2004-10-13
• Cigarette pkgs. — 2004-02-29
• Warehouse array: Abbr. — 2002-11-16
• Boxes: Abbr. — 2001-11-20
• Egg holders: Abbr. — 2001-01-05
• Warehouse supply: Abbr. — 1998-05-03