I already found difftime between now and the highest value of time_t. I would like to know how I can format the value into years, months, days, hours, and minutes. Thanks.

Hi: Take a look at the tm structure in the time.h header file. Here's a stub program using some of the functions: Regards, Nails #include #include main() { struct tm *old, *new; time_t tloc, newtloc; /* generally time_t is a long */ time(&tloc); /* get time in seconds since EPOCH */ printf("time in seconds since EPOCH is %ld\n", tloc); old=localtime(&tloc); /* convert seconds to date structure */ printf("year is %d\n",old->tm_year); printf("month is %d\n",old->tm_mon+1); printf("day is %d\n",old->tm_mday); printf("hour is %d\n",old->tm_hour); printf("min is %d\n",old->tm_min); new=old; newtloc=mktime(new); /* convert structure to seconds */ if(newtloc == tloc) printf("they're equal\n"); }