Function template operator<<
boost::gregorian::operator<< — operator<< for gregorian::greg_month typically streaming: Jan, Feb, Mar...
template<typename charT, typename traits>
std::basic_ostream< charT, traits > &
operator<<(std::basic_ostream< charT, traits > & os, const greg_month & m);
Uses the date facet to determine output string as well as selection of long or short strings. Default if no facet is installed is to output a 2 wide numeric value for the month eg: 01 == Jan, 02 == Feb, ... 12 == Dec.