# std::chrono::operator==,<=>(std::chrono::month_day)

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< cpp‎ | chrono‎ | month day

Defined in header `<chrono>` |  |
constexpr bool operator==( const std::chrono::month_day & x, const std::chrono::month_day & y ) noexcept; | (1) | (since C++20)
constexpr std::strong_ordering operator<=>( const std::chrono::month_day & x, const std::chrono::month_day & y ) noexcept; | (2) | (since C++20)

Compares two `month_day` values.

The `<`, `<=`, `>`, `>=`, and `!=` operators are synthesized from operator<=> and operator== respectively.

### Return value

1) x.month() == y.month() && x.day() == y.day()
2) x.month() <=> y.month() != 0 ? x.month() <=> y.month() : x.day() <=> y.day()

### Example

Run this code

    #include <chrono>
    #include <iostream>

    int main()
    {
        constexpr auto md1{std::chrono::August/15};
        constexpr auto md2{std::chrono::month(8)/std::chrono::day(15)};
        std::cout << std::boolalpha << (md1 == md2) << '\n';

        static_assert(md1 <= md2);
    }

Output:

    true

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