ChallengeQuestionChapter11:Struct

Objective-C Programming (2nd Edition) 11. Structs
1

Hi!
I am posting my solution for this chapter’s challenge question hoping that anybody can give their comments on it because I want to improve better.
Therefore, thanks in advance!

My code is:

#include <stdio.h>
#include <time.h>

int main(int argc, const char * argv[]) {

    printf("**************************\n");
    printf("Challenge Qusetion\n");
    printf("**************************\n");
    
    //Calculate today's date
    long secondsSince1970 = time(NULL);
    struct tm todayDate;
    localtime_r(&secondsSince1970, &todayDate);
    printf("Today date is %d:%d:%d\n", todayDate.tm_mday, todayDate.tm_mon+1, todayDate.tm_year+1900);
    
    //Calculate date 4 millions seconds from now
    long fourMillionSeconds = 4000000;
    long totalSeconds = fourMillionSeconds + secondsSince1970;
    //Question wants to know 4million seconds from now.
    //So we add "number of seconds from 1970 until now" and 4millionseconds together.
    
    struct tm dateAfter4MillionSeconds;
    localtime_r(&totalSeconds, &dateAfter4MillionSeconds);
    printf("The date after 4 million seconds from now is %d:%d:%d",
           dateAfter4MillionSeconds.tm_mday,
           dateAfter4MillionSeconds.tm_mon+1,
           dateAfter4MillionSeconds.tm_year+1900);
    return 0;
}

The output is:

[code]

Challenge Qusetion

Today date is 6:6:2015
The date after 4 million seconds from now is 23:7:2015[/code]