mbllllohok

#include <time.h>
time_t maxt = charToTime((*x)[0].date_of_birth);
maxi = 0;
for (int i = 1; i < *number_of_animals; i = i + 1) {
    time_t = charToTime((*x)[0].date_of_birth);
    if (maxt < t) {
        maxt = t; 
        maxi = i;
    }
}

time_t charToTime(char date[]) {
    date[2] = date[5] = '\0';
    struct tm tmdate = {0};
    tmdate.tm_mday= atoi(&date[0]);
    tmdate.tm_mon = atoi(&date[3]) - 1;
    tmdate.tm_year = atoi(&date[6]);
    return mktime( &tmdate );
}