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    std::chrono::month_day::month_day

    From cppreference.com
     
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    Date and time library
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    chrono I/O
    (C++20)

     
    std::chrono::month_day
     
    month_day() = default;
    		(1) (since C++20) 
    constexpr month_day( const std::chrono::month& m,
                     const std::chrono::day& d ) noexcept;
    		(2) (since C++20)

    Constructs a month_day.

    1) Default constructor leaves the stored month and day values uninitialized.
    2) Constructs a month_day that stores the month m and the day d.

    Notes

    A more convenient way to construct a month_day is with operator/, e.g., std::chrono::April/1.

    Example

    Run this code
    #include <chrono>
#include <iostream>

int main()
{
    using namespace std::chrono_literals;
    constexpr auto mo_da = std::chrono::month_day(std::chrono::February, 29d);
    std::cout << static_cast<unsigned>(mo_da.day()) << '/' 
              << static_cast<unsigned>(mo_da.month()) << '\n';
}

    Output: 

    29/2

    See also

    (C++20)
    		 conventional syntax for Gregorian calendar date creation
    (function) [edit]