std::tm
        to_tm(zoned_seconds tp)
    {
        using namespace std;
        using namespace std::chrono;
        auto lt = tp.get_local_time();
        auto ld = floor<days>(lt);
        time_of_day<seconds> tod{ lt - ld };  // HERE!!!
        year_month_day ymd{ ld };
        tm t{};
        t.tm_sec = tod.seconds().count();
        t.tm_min = tod.minutes().count();
        t.tm_hour = tod.hours().count();
        t.tm_mday = (ymd.day() - 0d).count();
        t.tm_mon = (ymd.month() - January).count();
        t.tm_year = (ymd.year() - 1900y).count();
        t.tm_wday = (weekday{ ld } - Sunday).count();
        t.tm_yday = (ld - local_days{ ymd.year() / January / 1 }).count();
        t.tm_isdst = tp.get_info().save != minutes{ 0 };
        return t;
    }