Computes the day of the week (Sunday through to Monday), for the specified serial Julian date.

Contents

Interface Function Documentation Page Comments

Interface

#include <codecogs/units/date/dayofweek.h>

using namespace Units::Date;

	int	dayOfWeek (int nDate, int type=1)[inline] Computes the day of the week (Sunday through to Monday), for the specified serial Julian date.
	Integer	cc_dayOfWeek (Integer nDate, Integer type) This function is available as a Microsoft Excel add-in.

Function Documentation

Calculates the week day from a serial Julian date. This is correct for both the Gregorian and Julian calendar. The solution is merely:

Example 1:

#include <stdio.h>
#include <codecogs/units/date/dayofweek.h>
#include <codecogs/units/date/date.h>
using namespace Units::Date;
 
int main()
{
  for(int i=10;i<20;i++)
  {
    int adate=date(2004, 10, i);
    printf("\n %d October 2004 is %d day of week", i, dayOfWeek(adate));
  }
  return 0;
}

• Type=1 (default) : return contains numbers 1 (Sunday) through 7 (Saturday).
• Type=2 : return contains numbers 1 (Monday) through 7 (Sunday).
• Type=3 : return contains numbers 0 (Monday) through 6 (Sunday).

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.
type	defines the output style for the day of the week

Authors:

Will Bateman (Oct 2004)