While every month in the calendar contains at least 30 days, February falls short with 28 (and 29 on a leap year). And this is usually blamed on Roman superstitious beliefs. The first Roman calendar had a glaring difference in structure from its later variants: it consisted of 10 months rather than 12. In order to fully synchronise the calendar with the lunar year, the Roman Emperor, Numa Pompilius added January and February to the original 10 months. The previous calendar had 6 months of 30 days and 4 months of 31,...