template<typename time_type> 
class c_local_adjustor {
public:
  // types
  typedef time_type::time_duration_type time_duration_type;
  typedef time_type::date_type          date_type;         
  typedef date_type::duration_type      date_duration_type;

  // public static functions
  time_type utc_to_local(const time_type &) ;
};