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std::chrono::month::month

month() = default;
(1) (since C++20)
explicit constexpr month(unsigned m) noexcept;
(2) (since C++20)

Constructs a month object.

1) Default constructor leaves the month value uninitialized.
2) If m <= 255, constructs a month object holding the month value m. Otherwise the value held is unspecified.

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