std::chrono::year_month::year,std::chrono::year_month::month (3) Linux Manual Page

std::chrono::year_month::year,std::chrono::year_month::month – std::chrono::year_month::year,std::chrono::year_month::month

Synopsis

constexpr std::chrono::year year() const noexcept; (1) (since C++20)
constexpr std::chrono::month month() const noexcept; (2) (since C++20)
Retrieves the year and month values stored in this year_month object.

Return values

1) Returns the stored std::chrono::year value.
2) Returns the stored std::chrono::month value.