Historical clue formulations

• English king who was a son of William the Conqueror — 2013-03-31
• English king said to have died from eating a "surfeit of lampreys" — 2012-07-31
• English king crowned in 1100 — 2010-12-14
• Son of William the Conqueror — 2007-09-23
• English king who was the youngest son of William the Conqueror — 2007-07-26
• Son of William the Conqueror — 2005-03-10
• Son of William the Conqueror — 1999-06-19