#include <iostream>

#include <boost/date_time/posix_time/ptime.hpp>
#include <boost/date_time/posix_time/time_serialize.hpp>
#include <boost/archive/binary_oarchive.hpp>

namespace pt = boost::posix_time;

int main() {

    std::stringstream test_stream( std::ios::in | std::ios::out | std::ios::binary );
    pt::ptime a;
    {
        boost::archive::binary_oarchive arch( test_stream, boost::archive::no_header | boost::archive::no_codecvt | boost::archive::no_tracking );
        arch << a;
    }
    std::cout << "serialized size: " << test_stream.str().size() << std::endl;

}