std::chrono::year_month(3)

NAME
std::chrono::year_month - std::chrono::year_month

Synopsis
   Defined in header <chrono>
   class year_month; (since C++20)
   The class year_month represents a specific month of a specific year, but with an
   unspecified day. It is a field-based time point, with a resolution of
   std::chrono::months.
   year_month is a TriviallyCopyable StandardLayoutType.

Member functions
   constructor constructs a year_month
                 (public member function)
   year accesses the stored year and month
   month (public member function)
   operator+= modifies the year_month by some number of months or years
   operator-= (public member function)
   ok checks if this year_month is valid
                 (public member function)
   Nonmember functions
   operator== compares two year_month values
   operator<=> (function)
   (C++20)
   operator+ performs arithmetic on year_month
   operator- (function)
   (C++20)
   operator<< outputs a year_month into a stream
   (C++20) (function template)
   from_stream parses a year_month from a stream according to the provided format
   (C++20) (function template)

Helper classes
   std::formatter<std::chrono::year_month> formatting support for year_month
   (C++20) (class template specialization)
   std::hash<std::chrono::year_month> hash support for std::chrono::year_month
   (C++26) (class template specialization)