using namespace std;

string asString (const chrono::system_clock::time_point& tp)
{
    time_t t = chrono::system_clock::to_time_t(tp);
    string ts = asctime(gmtime(&t));
    ts.resize(ts.size()-1);
    return ts;
}


int main() {
    chrono::system_clock::time_point tp;
    cout << "epoch: " << asString(tp) << endl;
    tp = chrono::system_clock::now();
    cout << "now: " << asString(tp) << endl;
    tp = chrono::system_clock::time_point::max();
    cout << "max: " << asString(tp) << endl;
    tp = chrono::system_clock::time_point::min();
    cout << "min: " << asString(tp) << endl;
    return 0;
}