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Synopsis:
    #include <dos.h>
    unsigned _dos_setdate( struct dosdate_t *date );

    struct dosdate_t {
            unsigned char day;      /* 1-31 */
            unsigned char month;    /* 1-12 */
            unsigned short year;    /* 1980-2099 */
            unsigned char dayofweek;/* 0-6 (0=Sunday) */
    };

Description:
    The _dos_setdate function uses system call 0x2B to set the current
    system date.  The date information is passed in a  dosdate_t structure
    pointed to by date.

Returns:
    The _dos_setdate function returns zero if successful.  Otherwise, it
    returns a non-zero value and sets  errno to  EINVAL indicating that an
    invalid date was given.

See Also:
    _dos_getdate, _dos_gettime, _dos_settime, gmtime Functions, localtime Functions, mktime,
    time

Example:
    #include <stdio.h>
    #include <dos.h>

    void main()
      {
        struct dosdate_t date;
        struct dostime_t time;

        /* Get and display the current date and time */
        _dos_getdate( &date );
        _dos_gettime( &time );
        printf( "The date (MM-DD-YYYY) is: %d-%d-%d\n",
            date.month, date.day, date.year );
        printf( "The time (HH:MM:SS) is: %.2d:%.2d:%.2d\n",
            time.hour, time.minute, time.second );

        /* Change it to the turn of the century */
        date.year = 1999;
        date.month = 12;
        date.day = 31;
        time.hour = 23;
        time.minute = 59;
        _dos_setdate( &date );
        _dos_settime( &time );
        printf( "New date (MM-DD-YYYY) is: %d-%d-%d\n",
            date.month, date.day, date.year );
        printf( "New time (HH:MM:SS) is: %.2d:%.2d:%.2d\n",
            time.hour, time.minute, time.second );
      }

    produces the following:

    The date (MM-DD-YYYY) is: 12-25-1989
    The time (HH:MM:SS) is: 14:23:15
    New date (MM-DD-YYYY) is: 12-31-1999
    New time (HH:MM:SS) is: 23:59:16

Classification:
    DOS

Systems:
    DOS, Win, OS/2 1.x(all), OS/2 2.x, NT, DOS/PM