nstrftime format string, FMT) the time data, *TM, and the UTC
and NANOSECONDS values. */
size_t fprintftime (FILE *fp, char const *fmt, struct tm const *tm,
nstrftime format string, FMT) the time data, *TM, and the UTC
and NANOSECONDS values. */
size_t fprintftime (FILE *fp, char const *fmt, struct tm const *tm,