general_fact: 6021 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
math_fact: 6021 is an uninteresting number.
trivia: 6021 is an uninteresting number.
historical_date: June 25th is the day in 1978 that the rainbow flag representing gay pride is flown for the first time in the San Francisco Gay Freedom Day Parade.