Day of the week in year program advanced

Given a date (month, day, and year) display the day of the week on which that date takes/took place and
the day of the week of January 1st for that year.

Example Execution :
Enter the month: 1
Enter the day: 15
Enter the year: 2010
Date: January 1, 2010 Day of week: Friday
Date: January 15, 2010 Day of week: Friday

I got the day of the week part done just for the jan 15th , 2010. But i need help displaying the "january 15,2010" or whatever date is entered. ALso I don't have any idea how to do the 1st of the month line or the day of the week for that. PLEASSSE HELLEEPPP! SOS

Code:

#include<stdio.h>



///////// Global Declarations 



int main()
{
        int y;                  /* year */
        int m;                  /* month */
        int d;                  /* date (day) */
        int newdate;            /* day of the week */

        printf("Enter the month:");
        scanf("%d", &m);
        printf("Enter the day : ");
        scanf("%d", &d);
        printf("Enter the year:");
        scanf("%d", &y);



         if (m < 3)
                {
                        m = m + 12;
                        y = y - 1;
                }





        newdate = (d + (2 * m) + ((6 * (m + 1)) / 10) + y + (y / 4) -

(y / 100) + (y / 400) + 1) % 7;

        switch (newdate)
        {
                case 0:
                {
                        puts("Day of week:Sunday.");
                        break;
                }
                case 1:
                {
                        puts(" Day of week : Monday.");
                        break;
                }
                case 2:
                {
                        puts("Day of week : Tuesday");
                        break;
                }
                case 3:
                {
                        puts("Day of week : Wednesday.");
                        break;
                }
                case 4:
                {
                        puts("Day of week : Thursday.");
                        break;
                }
                case 5:
                {
                        puts("Day of week : Friday.");
                        break;
                }
                case 6:
                {
                        puts("Day of week : Saturday.");
                        break;
                }
                default:
                {
                        puts("Day of week : Wrong Date!");
                }
        }

        return 0;

Lookup the manpage of mktime().