DateTime broken for certain values about flaxengine HOT 3 CLOSED

    // check with C functions
    tm tm;
    tm.tm_year = year - 1900;
    tm.tm_mon = month - 1;
    tm.tm_mday = day;
    tm.tm_hour = hour;
    tm.tm_min = minute;
    tm.tm_sec = second;
    tm.tm_isdst = 0;
    const time_t t = mktime(&tm);
    LOG(Info, "Time structure constructed with C function: {0}, time_t={1}", String(ctime(&t)), t);
    const auto dt2 = DateTime::FromUnixTimestamp(t);
    LOG(Info, "results in {0} (ticks={1})", dt2, dt2.Ticks);
    // this should be the same as dt1 - milliseconds
    LOG(Info, "Expected difference is {0}ms, actually is {1} ticks", millisecond, (dt1-dt2).Ticks);
    const auto t2 = dt1.ToUnixTimestamp();
    if (t != t2)
        LOG(Warning, "timestamps differ: DateTime example: {0}, should be: {1}", t2, t);

[ 00:57:19.968 ]: [Info] Time structure constructed with C function: Sat Dec 16 23:50:13 2023
, time_t=1702767013
[ 00:57:19.968 ]: [Info] results in 2023-12-17 22:50:13 (ticks=638383638130000000)
[ 00:57:19.968 ]: [Info] Expected difference is 5ms, actually is 36000050000 ticks
[ 01:04:33.652 ]: [Warning] timestamps differ: DateTime example: 1702770613, should be: 1702767013

    // check TZ
    DateTime local = DateTime::Now();
    DateTime nowInUTC = DateTime::NowUTC();
    LOG(Info, "difference between local ({1}) and UTC ({2}) is {0}", local - nowInUTC, local, nowInUTC);
    LOG(Info, "hours local - hours in UTC is {0}", local.GetHour() - nowInUTC.GetHour());
    LOG(Info, "day*24+hours local - UTC is {0}", (local.GetDay() * 24 + local.GetHour()) - (nowInUTC.GetDay() * 24 + nowInUTC.GetHour()));

[ 01:23:33.440 ]: [Info] difference between local (2023-12-29 00:38:06) and UTC (2023-12-29 23:38:06) is 01:00:00.0000000
[ 01:23:33.440 ]: [Info] hours local - hours in UTC is -23
[ 01:23:33.440 ]: [Info] day*24+hours local - UTC is -23