relating date....

->How can I find the day of the week given the date?

ths is straight from the MSDN

Code:

---


/* TIMES.C illustrates various time and date functions including:
 *      time            _ftime          ctime      asctime
 *      localtime      gmtime          mktime      _tzset
 *      _strtime        _strdate        strftime
 *
 * Also the global variable:
 *      _tzname
 */

#include <time.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/timeb.h>
#include <string.h>

void main()
{
    char tmpbuf[128], ampm[] = "AM";
    time_t ltime;
    struct _timeb tstruct;
    struct tm *today, *gmt, xmas = { 0, 0, 12, 25, 11, 93 };

    /* Set time zone from TZ environment variable. If TZ is not set,
    * the operating system is queried to obtain the default value
    * for the variable.
    */
    _tzset();

    /* Display operating system-style date and time. */
    _strtime( tmpbuf );
    printf( "OS time:\t\t\t\t%s\n", tmpbuf );
    _strdate( tmpbuf );
    printf( "OS date:\t\t\t\t%s\n", tmpbuf );

    /* Get UNIX-style time and display as number and string. */
    time( &ltime );
    printf( "Time in seconds since UTC 1/1/70:\t%ld\n", ltime );
    printf( "UNIX time and date:\t\t\t%s", ctime( &ltime ) );

    /* Display UTC. */
    gmt = gmtime( &ltime );
    printf( "Coordinated universal time:\t\t%s", asctime( gmt ) );

    /* Convert to time structure and adjust for PM if necessary. */
    today = localtime( &ltime );
    if( today->tm_hour > 12 )
    {
  strcpy( ampm, "PM" );
  today->tm_hour -= 12;
    }
    if( today->tm_hour == 0 )  /* Adjust if midnight hour. */
  today->tm_hour = 12;

    /* Note how pointer addition is used to skip the first 11
    * characters and printf is used to trim off terminating
    * characters.
    */
    printf( "12-hour time:\t\t\t\t%.8s %s\n",
      asctime( today ) + 11, ampm );

    /* Print additional time information. */
    _ftime( &tstruct );
    printf( "Plus milliseconds:\t\t\t%u\n", tstruct.millitm );
    printf( "Zone difference in seconds from UTC:\t%u\n",
            tstruct.timezone );
    printf( "Time zone name:\t\t\t\t%s\n", _tzname[0] );
    printf( "Daylight savings:\t\t\t%s\n",
            tstruct.dstflag ? "YES" : "NO" );

    /* Make time for noon on Christmas, 1993. */
    if( mktime( &xmas ) != (time_t)-1 )
  printf( "Christmas\t\t\t\t%s\n", asctime( &xmas ) );

    /* Use time structure to build a customized time string. */
    today = localtime( &ltime );

    /* Use strftime to build a customized time string. */
    strftime( tmpbuf, 128,
        "Today is %A, day %d of %B in the year %Y.\n", today );
    printf( tmpbuf );
}



Output

OS time:                                21:51:03
OS date:                                05/03/94
Time in seconds since UTC 1/1/70:      768027063
UNIX time and date:                    Tue May 03 21:51:03 1994
Coordinated universal time:            Wed May 04 04:51:03 1994
12-hour time:                          09:51:03 PM
Plus milliseconds:                      279
Zone difference in seconds from UTC:    480
Time zone name:                       
Daylight savings:                      YES
Christmas                              Sat Dec 25 12:00:00 1993

Today is Tuesday, day 03 of May in the year 1994.

---

like this.....

Go to the market. Buy a calender. Check the date of the last sunday before the given date and subtract it from the given date. You will get the no of days. Now SHUT UP and start doing some work on your own.