...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
constexpr std::uint16_t year() const noexcept;
Represents the year number in the Gregorian calendar. If this->valid() == true
,
this value is within the [0, 9999]
range.
No-throw guarantee.