std::chrono::month::ok (3) - Linux Manuals
std::chrono::month::ok: std::chrono::month::ok
NAME
std::chrono::month::ok - std::chrono::month::ok
Synopsis
constexpr bool ok() const noexcept; (since C++20)
Checks if the month value stored in *this is in the valid range, i.e., [1, 12].
Return value
true if the month value stored in *this is in the range [1, 12]. Otherwise false.