The christian calendar | calendars, The "christian calendar" is the term traditionally used to designate the calendar commonly in use, although it originated in pre-christian rome.. 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.. When leap year? leap day? | , When is leap year? find out the next leap day, how to calculate leap years, leap year folklore, and more on almanac.com..
Julian date converter - united states navy, Notes. julian dates (abbreviated jd) simply continuous count days fractions noon universal time january 1, 4713 bc ( julian calendar).. http://aa.usno.navy.mil/data/docs/JulianDate.php Leap year years - time date, Is 2016 leap year? leap year 366 days, opposed common year, 365. add leap day – february 29 – years.. http://www.timeanddate.com/date/leapyear.html 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