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Mission control center's board with time data, displaying coordinated universal time with ordinal date (without year) prepended, on October 22, 2013 (i.e.2013-295). An ordinal date is a calendar date typically consisting of a year and an ordinal number, ranging between 1 and 366 (starting on January 1), representing the multiples of a day, called day of the year or ordinal day number (also ...
This template generates an ordinal date. Used alone as {{Ordinal date}} it will generate the ordinal date for the current year-month-day. Check the result at tycho.usno.navy.mil after this page. This template may also be used to generate the ordinal date for any Gregorian calendar dates by passing the proper syntax to the following variables:
The term Julian date may also refer, outside of astronomy, to the day-of-year number (more properly, the ordinal date) in the Gregorian calendar, especially in computer programming, the military and the food industry, [10] or it may refer to dates in the Julian calendar. For example, if a given "Julian date" is "October 5, 1582", this means ...
No guidance is provided about conversion of dates before March 5, -500, or after February 29, 2100 (both being Julian dates). For unlisted dates, find the date in the table closest to, but earlier than, the date to be converted. Be sure to use the correct column. If converting from Julian to Gregorian, add the number from the "Difference" column.
This template returns the date (month name and day of month) from a day number in a year. Syntax: {{Date from ordinal|day of year}} {{Date from ordinal|day of year|year}} {{Date from ordinal|day of year|leapyear=isleap}} The year parameter is optional. If specified the date serial is handled for that specific year (leapyear is then ignored).
These formulas are based on the observation that the day of the week progresses in a predictable manner based upon each subpart of that date. Each term within the formula is used to calculate the offset needed to obtain the correct day of the week. For the Gregorian calendar, the various parts of this formula can therefore be understood as follows:
Subtract the weekday number from the ordinal day of the year. Add 10. Divide by 7, discard the remainder. If the week number thus obtained equals 0, it means that the given date belongs to the preceding (week-based) year. If a week number of 53 is obtained, one must check that the date is not actually in week 1 of the following year. Formula
Or, like a Julian day, does an ordinal date begin at noon, so: At midnight when January 1 begins, the ordinal date is -0.5; At noon on January 1, the ordinal date is 1.0; At midnight when January 2 begins, the ordinal date is 1.5; This question relates to the formulas in declination#Sun, where the value of 'N' is