день учителя

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
 
int main(void){
    int year;
    time_t inSeconds;
    struct tm stm = { 0 };
    char buf[BUFSIZ];
    
    printf("Year: ");
    if ( scanf("%d", &year) != 1 ){
        fprintf(stderr, "Wrong input!\n");
        exit(1);
    }
    if ( year < 1970 || year > 2037 ){
        fprintf(stderr, "Too far!\n");
        exit(1);
    }
    
    stm.tm_year = year - 1900;
    stm.tm_mon = 9;
    stm.tm_mday = 1;
    stm.tm_sec = 1;
    
    inSeconds = mktime(&stm);
    stm = *(localtime(&inSeconds));
    if ( stm.tm_wday ){
        stm.tm_mday += 7 - stm.tm_wday;
        inSeconds = mktime(&stm);
        stm = *(localtime(&inSeconds));
    }
    
    strftime(buf, BUFSIZ, "%A %d %B %Y", &stm);
    
    printf("Teachers day is %s\n", buf);
    
    exit(0);
}