template<typename facet_type, typename charT = char> 
class ostream_month_formatter {
public:
  // types
  typedef facet_type::month_type      month_type;  
  typedef std::basic_ostream< charT > ostream_type;

  // public static functions
  void format_month(const month_type &, ostream_type &, const facet_type &) ;
};