You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: BEFORE HE WAS PRESIDENT... 
Clue: He went to Stanford & became a mining engineer
hoover

Category: HOLIDAYS & OBSERVANCES 
Clue: In Italy some families eat a traditional supper of fried eels on this December Eve
christmas eve

Category: THE CALENDAR 
Clue: In 2007 the Fourth of July was a Wednesday; in 2008, it will fall on this day

friday