std::chrono::month_day_last::month (3) Linux Manual Page

std::chrono::month_day_last::month – std::chrono::month_day_last::month

Synopsis

constexpr std::chrono::month month() const noexcept; (since C++20)
Retrieves a copy of the std::chrono::month object stored in *this.

Return value

A copy of the std::chrono::month object stored in *this.