This is the program to figure out the day entered on a particular date but remember this code works between the years 1900 to 1999 suppose u enter the date as 5/1/1957 then the day comes out to be saturday so try it out and post ur comments

Code:
/*this is d program to figure out the day on a particular date entered*/
#include<stdio.h>
#include<stdlib.h>
#include<conio.h>

void main()
{
	clrscr();
	int d,m,y,year,month,day,i,n;
	printf("Enter the date :	");
	scanf("%d%d%d",&day,&m,&y);
	if( day>31 || m>12 || (y<1900 || y>=2000) )
	{
		printf("INVALID INPUT");
		getch();
		exit(0);
	}
	year = y-1900;
	year = year/4;
	year = year+y-1900;
	switch(m)
	{
	case 1:
	case 10:
		month = 1;
		break;
	case 2:
	case 3:
	case 11:
		month = 4;
		break;
	case 7:
	case 4:
		month = 0;
		break;
	case 5:
		month = 2;
		break;
	case 6:
		month = 5;
		break;
	case 8:
		month = 3;
		break;
	case 9:
	case 12:
		month = 6;
		break;
	}
	year = year+month;
	year = year+day;
	d= year%7;
	switch(d)
	{
	case 0:
		printf("Day is SATURDAY");
		break;
	case 1:
		printf("Day is SUNDAY");
		break;
	case 2:
		printf("Day is MONDAY");
		break;
	case 3:
		printf("Day is TUESDAY");
		break;
	case 4:
		printf("Day is WEDNESDAY");
		break;
	case 5:
		printf("Day is THURSDAY");
		break;
	case 6:
		printf("Day is FRIDAY");
		break;
	}

	getch();

}