void print_calendar(const date &d, const POTOM_NAZOVU_NORMALNO& di)
{
    CONSOLE_SCREEN_BUFFER_INFO inf;
    HANDLE hConsole = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hConsole, &inf);
    unsigned short prev = inf.wAttributes;
    unsigned short red = 4;


    int wd = weekday(d);

    cout << " П  В  С  Ч  П  С  В" << endl << endl;

    whitespace(wd * 3);

    for(int i = 1; i <= days_in_month(d.month(), d.year()); i++)
    {
        if(di.check(date(i, d.month(), d.year())))
        {
            SetConsoleTextAttribute(hConsole, red);
            cout << setw(2) << i;
            SetConsoleTextAttribute(hConsole, prev);
        }
        else
            cout << setw(2) << i;

        cout << " ";
        wd = (wd + 1) % 7;
        if(wd == 0)
            cout << endl;
    }
    cout << endl;
}