Jesuitica: Changing times
When Pope Gregory XIII needed advice on how to revise the Julian calendar in 1582, he turned to a Jesuit mathematician at the Roman College, Christopher Clavius, who said: “Suppress ten days in the Julian calendar, and every 400 years omit the extra day of what would otherwise be a leap year.” Even though English Protestants denounced it as a “Jesuit plot”, it worked.