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year

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Extracts the year from a serial Julian date. Excel: MONTH

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Contents

Interface
Year
Year
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Dependents

Interface

C++

Year

intyear(	int	`nDate`
	calendar	`dateSystem`	)[inline]

Returns the year contained within a serial Julian date as an integer. This function uses dateYMD, to convert the serial Date into a day/ month/ year, from which the year is returned.

Example 1

#include <stdio.h>
#include <codecogs/units/date/year.h>
using namespace Units::Date;
 
int main()
{
  printf("\n The year is %d", year(1741667));               // The year is 0056
  printf("\n The year is %d", year(1841667, cal_Julian));   // The year is 0330
  return 0;
}

cal_Gregorian - n.b. there is an optimised year function for Gregorian dates.
cal_Julian - the only sensible mode (for the time being!!)
cal_Excel (same as Gregorian)

Note

It may be faster to simply use dateYMD, particularly if you also need the day and year from a date.

Parameters

nDate	is a serial number of days from 24 November 4714 BC (1 January 4713BC in the Julian Calendar) - also known as the Julian Period.
dateSystem	selects which date system should be used (see constants):

Authors

Will Bateman (Sep 2004)

Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

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Year

intyear( int nDate )[inline]

Returns as an integer the Gregorian year for the serial Julian date, nDate. This function performs the following calculation:

$a = JulianDate + 32103$

(2)

$b = \frac{a}{146097}$

(3)

$c = a\ mod\ 146097$

(4)

$d = \frac{c}{36525}$

(5)

$e = c\ mod\ 36525 + d$

(6)

$Year = 400 \frac{a}{146097} + 100 d + 4 \frac{e}{1461} + \frac{e\ mod\ 1461}{365} - 4800$

(7)

where all division are integer divisions with the remainder discarded.

References:

www.ortelius.de/kalender/calc_en.php

Example 2

#include <stdio.h>
#include <codecogs/units/date/year.h>
using namespace Units::Date;
 
void main()
{
  printf("\n The year is %d", year(27325));          // The year is 1974
  printf("\n The year is %d", year(169304));         // The year is 2367
}