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
Valentine tank month in a year and peaking at 20 per week in 1943, before production was slowed and then production of the Valentine and derivatives stopped in 1945. Vickers-Armstrong produced 2,515 vehicles and Metropolitan 2,135, total UK production was 6,855 tanks. To develop its own tank forces, Canada had established tank production facilities. An order was placed in 1940 with Canadian Pacific and after modifications to the Valentine design to use local standards and materials, the production prototype was finished in 1941. Canadian production was mainly at CPR Angus Shops in Montreal and 1,420 were produced in Canada of 1,388 were