math_fact: 4461 is the number of asymmetrical 10-ominoes.
trivia: 4461 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
historical_date: March 18th is the day in 1959 that President Dwight D. Eisenhower signs a bill into law allowing for Hawaiian statehood, which would become official on August 21.