Why are the number of days in a month not equal?
Our calendar, the Gregorian calendar, is a reformed version of the Julian calendar. The Julian calendar, in turn, was a reformed version of the Roman calendar. It was during the reign of Julius Caesar that the calendar was realigned drastically, to make it function somewhat more seamlessly. Before the Julian reform, the number of days in a month was as follows: Ianuarius was 29 days, Februarius was 28 days, Martius was 31 days, Aprilis was 29 days, Maius was 31 days, Iunius was 29 days, Quintilis was 31 days, Sextilis was 29 days, September was 29 days, October was 31 days, November was 29 days, December was 29 days, and there was an Intercalaris month which was 27 days long. In the new Julian calendar, the Intercalaris month was abolished entirely, and the number of days in a month changed for the shorter months. Those months which already had a length of 31 days remained the same, while Ianuarius, Sextilis, and December each gained two days, and Aprilis, Iunius, September, and Novemb
Before the Julian reform, the number of days in a month was as follows: Ianuarius was 29 days, Februarius was 28 days, Martius was 31 days, Aprilis was 29 days, Maius was 31 days, Iunius was 29 days, Quintilis was 31 days, Sextilis was 29 days, September was 29 days, October was 31 days, November was 29 days, December was 29 days, and there was an Intercalaris month which was 27 days long. In the new Julian calendar, the Intercalaris month was abolished entirely, and the number of days in a month changed for the shorter months. Those months which already had a length of 31 days remained the same, while Ianuarius, Sextilis, and December each gained two days, and Aprilis, Iunius, September, and November each gained one day, while Februarius remained the same, although it gained one extra day every four years, to equalize the calendar somewhat. Quintilis was later renamed Iulius in honor of Julius Caesar, and Sextilis was renamed August in honor of Augustus Caesar. Looking at the older Ro
