Computus - wikipedia, Computus (latin for "computation") is a calculation that determines the calendar date of easter. because the date is based on a calendar-dependent equinox rather than.
Calendar year 2015 (united states) - time date, United states 2015 – calendar american holidays. yearly calendar showing months year 2015. calendars – online print friendly – year . http://www.timeanddate.com/calendar/?year=2015 Year 2015 calendar – germany - timeanddate., Germany 2015 – calendar holidays. yearly calendar showing months year 2015. calendars – online print friendly – year month. http://www.timeanddate.com/calendar/?year=2015&country=8 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