General fact: 52 is the number of white keys (notes in the C major scale).
Mathematical fact: 52 is the 5^{th} Bell number.
Trivia: 52 is the number of white keys (notes in the C major scale).
Historical date: February 21st is the day in 1543 that Battle of Wayna Daga – A combined army of Ethiopian and Portuguese troops defeats a Muslim army led by Ahmed Gragn.