std::chrono::month
From cppreference.com
                    
                                        
                    
                    
                                                            
                    |   Defined in header  <chrono>
  | 
||
|   class month;  | 
(since C++20) | |
|   inline constexpr std::chrono::month January{1};  | 
(since C++20) | |
|   inline constexpr std::chrono::month February{2};  | 
(since C++20) | |
|   inline constexpr std::chrono::month March{3};  | 
(since C++20) | |
|   inline constexpr std::chrono::month April{4};  | 
(since C++20) | |
|   inline constexpr std::chrono::month May{5};  | 
(since C++20) | |
|   inline constexpr std::chrono::month June{6};  | 
(since C++20) | |
|   inline constexpr std::chrono::month July{7};  | 
(since C++20) | |
|   inline constexpr std::chrono::month August{8};  | 
(since C++20) | |
|   inline constexpr std::chrono::month September{9};  | 
(since C++20) | |
|   inline constexpr std::chrono::month October{10};  | 
(since C++20) | |
|   inline constexpr std::chrono::month November{11};  | 
(since C++20) | |
|   inline constexpr std::chrono::month December{12};  | 
(since C++20) | |
The class month represents a month in a year. Its normal range is [1, 12], but it may hold any number in [0, 255]. Twelve named constants are predefined in the std::chrono namespace for the twelve months of the year.
month is a TriviallyCopyable StandardLayoutType.
Member functions
  constructs a month (public member function)  | |
|    increments or decrements the month   (public member function)  | |
|    adds or subtracts a number of months   (public member function)  | |
|    retrieves the stored month value   (public member function)  | |
|   checks if the stored month value is in the normal range   (public member function)  | 
Nonmember functions
   compares two month objects (function)  | |
   performs arithmetic on months (function)  | |
   outputs a month into a stream  (function template)  | |
   outputs a month into a stream according to the provided format (function template)  | |
   parses a month from a stream according to the provided format  (function template)  |