The following example converts an ASCII time string to its binary
    equivalent.

    utc_t     utc;
    char      str[UTC_MAX_STR_LEN];

    /*
     *   July 4, 1776, 12:01:37.223 local time
     *   TDF of -5:00 hours
     *   Inaccuracy of 3600.32 seconds
     */

    (void)strcpy((void *)str,
                 "1776-07-04-12:01:37.223-5:00 I 3600.32");

    utc_mkasctime(&utc,    /* Out: Binary utc            */
                  str);    /* In:  String                */