Historical clue formulations

• Denmark's ___ Islands — 2011-11-30
• Denmark's ___ Islands — 2011-08-07
• Denmark's ___ Islands — 2007-07-04
• ___ Islands, between Scotland and Iceland — 2001-03-01
• North Atlantic's ___ Islands — 1998-01-15
• Denmark's _____ Islands — 1994-02-06