Mathematical fact: 1215 is the smallest number n where n and n+1 are both products of 6 or more primes.
Trivia: 1215 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: April 29th is the day in 1965 that Pakistan's Space and Upper Atmosphere Research Commission (SUPARCO) successfully launches its seventh rocket in its Rehber series.