std::chrono::operator ==,!=,<,<=,>,>= (std::chrono::month)
| constexpr bool operator==(const std::chrono::month& x, const std::chrono::month& y) noexcept; | (1) | (since C++20) | 
| constexpr bool operator!=(const std::chrono::month& x, const std::chrono::month& y) noexcept; | (2) | (since C++20) | 
| constexpr bool operator< (const std::chrono::month& x, const std::chrono::month& y) noexcept; | (3) | (since C++20) | 
| constexpr bool operator<=(const std::chrono::month& x, const std::chrono::month& y) noexcept; | (4) | (since C++20) | 
| constexpr bool operator> (const std::chrono::month& x, const std::chrono::month& y) noexcept; | (5) | (since C++20) | 
| constexpr bool operator>=(const std::chrono::month& x, const std::chrono::month& y) noexcept; | (6) | (since C++20) | 
Compare the two std::chrono::month x and y.
Return value
1) 
 unsigned(x) == unsigned(y)
2) 
 unsigned(x) != unsigned(y)
3) 
 unsigned(x) < unsigned(y)
4) 
 unsigned(x) <= unsigned(y)
5) 
 unsigned(x) > unsigned(y)
6) 
          unsigned(x) >= unsigned(y)
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