std::chrono::month_weekday_last
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header  <chrono>
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|   class month_weekday_last;  | 
(since C++20) | |
The class month_weekday_last represents the last weekday of a specific month, of some yet to be specified year.
month_weekday_last is a TriviallyCopyable StandardLayoutType.
Member functions
  constructs a month_weekday_last (public member function)  | |
|    retrieves the stored month and weekday_last values   (public member function)  | |
|    checks whether the contained month and weekday_last are valid   (public member function)  | 
Nonmember functions
   compares two month_weekday_last objects (function)  | |
   outputs a month_weekday_last into a stream  (function template)  |