Roman catholic calendar: liturgical calendar , A complete catholic calender for use with the liturgy of the hours. When leap year? | earth | earthsky, The last leap year was 2016, and the next one is 2020! leap days are extra days added to the calendar to help synchronize it with earth’s orbit around the sun and.
Easter 2016 - calendar-12., Easter 2016 sunday, march 27 (fourth sunday march). check date easter 2018 years.. http://www.calendar-12.com/holidays/easter/2016 Julian day - wikipedia, Julian day continuous count days beginning julian period primarily astronomers. julian day number (jdn) integer. https://en.wikipedia.org/wiki/Julian_day Old style style dates - wikipedia, Old style (..) style (..) terms dates calendar convention time . https://en.wikipedia.org/wiki/Old_Style_and_New_Style_dates