Year a leap year there are 366 days. A leap year occurs every fourth year, or leap year, during which a leap day is intercalated into the month of February. The name "Leap Day" is applied to the added day. The Revised Julian calendar, proposed in 1923 and used in some Eastern Orthodox Churches, has 218 leap years every 900 years, for the average (mean) year length of days, close to the length of the mean tropical year, days (relative error of 9·10). In the year 2800 CE, the Gregorian and Revised Julian calendars will begin to differ by one calendar
Iunius (month) Iunius (month) On the ancient Roman calendar, mensis Iunius or Iunius, also Junius (June), was the fourth month, following "Maius" (May). In the oldest calendar attributed by the Romans to Romulus, "Iunius" was the fourth month in a ten-month year that began with March "(Martius," "Mars' month"). The month following June was thus called "Quinctilis" or "Quintilis", the "fifth" month. "Iunius" had 29 days until a day was added during the Julian reform of the calendar in the mid-40s BC. The month that followed "Iunius" was renamed "Iulius" (July) in honour of Julius Caesar. In his poem on the Roman