Day year calendar — ges disc - goddard earth sciences, Day of year or julian date? note that julian date is sometimes used as a synonym for day of year, but this is not correct usage. day of year ranges from. Leap year explained - infoplease, Leap year explained leap years synchronize the calendar year with the solar year by ann marie imbornoni & mark hughes. The julian gregorian calendars - hermetic, The julian calendar, the gregorian reform and its adoption, astronomical year numbering, the julian and the gregorian proleptic calendars, and the accuracy of calendars..
Julian day - wikipedia, Julian gregorian calendar julian day number. algorithm richards convert julian day number, , date gregorian calendar. https://en.wikipedia.org/wiki/Julian_day The julian calendar - time date, The julian calendar reformed ancient roman calendar consists cycles 365-day years 366-day leap year. introduced named . http://www.timeanddate.com/calendar/julian-calendar.html Leap year - wikipedia, A leap year ( intercalary year bissextile year) calendar year additional day (, case lunisolar calendars, month. https://en.wikipedia.org/wiki/Leap_year