now.c

#import "stdio.h"
#import "time.h"
#import "string.h"

int main() {
    time_t now;
    int hour;
    char ampm[2];
    struct tm * local;

    time(&now);
    local = localtime(&now);

    if (local->tm_hour > 12) {
        hour = local->tm_hour - 12;
        strncpy(ampm, "pm", 2);
    } else {
        hour = local->tm_hour;
        strncpy(ampm, "am", 2);
    }

    int seconds_since_midnight = (local->tm_hour * 3600) +
        (local->tm_min * 60) +
        (local->tm_sec);

    int day_seconds = 24 * 60 * 60;
    int day_percent = (seconds_since_midnight * 100) / day_seconds;
    int week_percent = ((local->tm_wday * day_seconds) +
            (seconds_since_midnight) * 100) / (7 * day_seconds);

    int year_percent = (((local->tm_yday * day_seconds) +
            seconds_since_midnight) * 100) / (365 * day_seconds);

    printf("%d:%02d%s d%d%% w%d%% y%d%%\n", hour, local->tm_min, ampm,
            day_percent, week_percent, year_percent);
}