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, Nebraska "station stopping place" or "water and waterfall city". Valentine is located at (42.873686, −100.550308). According to the United States Census Bureau, the city has a total area of , of which, is land and is water. Valentine is immediately north of the Niobrara River, on the northern edge of the Sandhills physiographic region. Merritt Reservoir, created by a dam on the Snake River, is located about southwest of Valentine. Snake River Falls, the largest waterfall in Nebraska, is located on the Snake River between the reservoir (a few miles downstream) and Valentine. Smith Falls, the tallest waterfall in Nebraska, is