if (year == 1918)return "26.09.1918";
    if (((year <= 1917) && (year%4 == 0)) ||
        ((year > 1918) && (year%400 == 0 ||
        ((year%4 == 0) && (year%100 != 0))))) return  "12.09." + to_string(year);
    else return  "13.09." + to_string(year);