std::chrono::operator<<(std::chrono::month)(3)

NAME
std::chrono::operator<<(std::chrono::month) - std::chrono::operator<<(std::chrono::month)

Synopsis
   Defined in header <chrono>
   template< class CharT, class Traits >
   std::basic_ostream<CharT, Traits>& (since C++20)
       operator<<( std::basic_ostream<CharT, Traits>& os, const
   std::chrono::month& m );
   If !m.ok(), inserts unsigned(m) followed by " is not a valid month" to os.
   Otherwise, forms a std::basic_string<CharT> s consisting of the abbreviated month
   name for the month represented by m, determined using the locale associated with os,
   and inserts s into os.
   Equivalent to
   return os << (m.ok() ?
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{:L%b}"), m) :
       std::format(os.getloc(), STATICALLY_WIDEN<CharT>("{} is not a valid month"),
   unsigned(m)));
   where STATICALLY_WIDEN<CharT>("...") is "..." if CharT is char, and L"..." if CharT
   is wchar_t.

Return value
   os

Notes
   This operator<< is primarily intended for debugging use. For control over
   formatting, use std::format.
   Defect reports
   The following behavior-changing defect reports were applied retroactively to
   previously published C++ standards.
     DR Applied to Behavior as published Correct behavior
   P2372R3 C++20 the given locale was used by default L is needed to use the given
                        locale

See also
   format stores formatted representation of the arguments
   (C++20) in a new string
                        (function template)
   std::formatter<std::chrono::month> formatting support for month
   (C++20) (class template specialization)