Mathematical fact: 9214 is the number of ways to stack 30 pennies in contiguous rows so that each penny lies on the table or on two pennies.
Trivia: 9214 is a boring number.
Historical date: March 23rd is the day in 1908 that American diplomat Durham Stevens is attacked by Korean assassins Jeon Myeong-un and Jang In-hwan, leading to his death in a hospital two days later.