std::chrono::month_day_last::month
From cppreference.com
                    
                                        
                    < cpp | chrono | month day last
                    
                                                            
                    |   constexpr std::chrono::month month() const noexcept;  | 
(since C++20) | |
Retrieves a copy of the std::chrono::month object stored in *this.
Return value
A copy of the std::chrono::month object stored in *this.