std::chrono::operator ==,!=,<,<=,>,>= (std::chrono::month_weekday)
From cppreference.com
                    
                                        
                    < cpp | chrono | month weekday
                    
                                                            
                    | constexpr bool operator==(const std::chrono::month_weekday& x, const std::chrono::month_weekday& y) noexcept; | (since C++20) | |
| constexpr bool operator!=(const std::chrono::month_weekday& x, const std::chrono::month_weekday& y) noexcept; | (since C++20) | |
Compares the two month_weekday objects x and y.
Return values
1) x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed().
2) !(x == y).