static long timeToNextLocalHour() {
  ret timeToNextLocalHour(now());
}

static long timeToNextLocalHour(long now) {
  L<S> l = splitAtSpace(simpleDateFormat_local("mm ss SSSS").format(now));
  ret 60*60000-((parseInt(first(l))*60 + parseInt(second(l)))*1000 + parseInt(third(l)));
}