Historical clue formulations

• Ian of "Alien" — 2018-08-24
• Baggins portrayer in "The Lord of the Rings" — 2009-01-18
• Celeste who won an Oscar for "Gentleman's Agreement" — 2004-09-07
• ___ oak — 2004-03-13
• Evergreen oak — 2002-01-17
• 1947 Oscar winner Celeste — 2000-02-22