Класс по работе с датой

uint InSomnia::Date::get_count_days_null_year() const
{
    const int32_t M = (m_month + 9) % 12; //5
    std::cout << "M = " << M << "\n";
    const int32_t Y = m_year - M / 10; //2023
    std::cout << "Y = " << Y << "\n";
    //738 395 + 505 - 20 + 5 + 153 + 21 = 739 059
    const int32_t count_days_null_year = 365 * Y + Y / 4 - Y / 100 + Y / 400 + (M * 306 + 5) / 10 + (m_day - 1);
    
    std::cout << "365 * Y = " << 365 * Y << "\n";
    std::cout << "Y / 4 = " << Y / 4 << "\n";
    std::cout << "Y / 100 = " << Y / 100 << "\n";
    std::cout << "Y / 400 = " << Y / 400 << "\n";
    std::cout << "(M * 306 + 5) / 10 = " << (M * 306 + 5) / 10 << "\n";
    std::cout << "(m_day - 1) = " << (m_day - 1) << "\n";
    std::cout << "count_days_null_year = " << count_days_null_year << "\n";
 
    return count_days_null_year;
}
 
void InSomnia::Date::set_date_from_count_days_null_year(const uint count)
{
    int64_t Y = (10000 * count + 14780) / 3652425;
    std::cout << "Y: " << Y << "\n";
    int64_t D = count - (365 * Y + Y / 4 - Y / 100 + Y / 400);
    if (D < 0)
    {
        --Y;
        D = count - (365 * Y + Y / 4 - Y / 100 + Y / 400);
    }
    const int64_t mi = (100 * D + 52) / 3060;
    m_month = (mi + 2) % 12 + 1;
    m_year = Y + (mi + 2) / 12;
    m_day = D - (mi * 306 + 5) / 10 + 1;
}

void InSomnia::Date::calc_days(const int32_t year)
{
    int32_t count_l  = 0;
    int32_t count_nl = 0;
 
    const int32_t start = 0;
    for (int32_t y = start; y < year; ++y)
    {
        if (is_leap_year(y))
        {
            ++count_l;
        }
        else
        {
            ++count_nl;
        }
    }
 
    const int32_t count = count_l + count_nl;
    const int32_t count_days = count_l * 366 + count_nl * 365;
 
    std::cout << "count_l: " << count_l << "\n";
    std::cout << "count_nl: " << count_nl << "\n";
    std::cout << "count: " << count << "\n";
    std::cout << "count_days: " << count_days << "\n";
}