Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Constructs a datetime from a time_point.

constexpr
datetime(
    time_point tp);

Strong guarantee. Throws on invalid input.

Type	Thrown On
`std::out_of_range`	If the resulting `datetime` object would be out of the [`min_datetime`, `max_datetime`] range.