TASK DEFINITION: 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.
PROBLEM: Category: BRITISH HISTORY 
Clue: Dying in 2009 at age 113, British WWI vet Henry Allingham was the last original surviving member of this group, formed 1918

SOLUTION: the royal air force

PROBLEM: Category: THE SPACE PROGRAM 
Clue: In 1979 NASA officials received a fine for littering from a small town in this country

SOLUTION: australia

PROBLEM: Category: ON THE CALENDAR 
Clue: In 1974, to save energy, it began in January instead of April & ended on October 27

SOLUTION:
daylight saving time