If you had to crown a single calendar date as the most historically loaded — the one that appears most often in the “on this day” lists, the one with the most wars started, treaties signed, revolutions launched, and famous people born — what would it be? Historians and data nerds have tried to answer this. The results are illuminating, if inconclusive. July 14th is a strong contender. Bastille Day, obviously — the symbolic start of the French Revolution in 1789.