title: Interoperability between boost::date_time and std::chrono
body: <p>How interoperable are boost::date_time and std::chrono?</p>
  
  <p>For example, is there a way to convert between boost::posix_time::ptime and std::chrono::time_point?</p>
  
  <p>I tried searching for documentation on such conversions but couldn't find any.</p>