std::chrono::year::max - cppreference.com

From cppreference.com

static constexpr year max() noexcept;

(since C++20)

Returns the largest possible year, that is, std::chrono::year(32767).

Return value

std::chrono::year(32767)

Example

#include <chrono>
#include <iostream>

int main()
{
    std::cout << "The maximum year is: " << (int)std::chrono::year::max() << '\n';
}

Output:

The maximum year is: 32767