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std::chrono::month_day::month, std::chrono::month_day::day

constexpr std::chrono::month month() const noexcept;
 (1) (since C++20) 
constexpr std::chrono::day day() const noexcept;
 (1) (since C++20)

Retrieves the month and day values stored in this month_day object.

Return value

1) Returns the stored std::chrono::month value.
2) Returns the stored std::chrono::day value.

Example 

#include <iostream>
#include <chrono>
 
int main()
{
    std::cout << std::boolalpha;
 
    constexpr auto md {std::chrono::July/15};  
    std::cout << (md.month() == std::chrono::month(7)) << ' ';
    std::cout << (md.day() == std::chrono::day(15)) << '\n';
}

Output:

true true

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