[MadeMan]

pawn Код:

stock ConvertMsToTime(ms)
{
    new seconds = ms/1000;
    new string[32];
    format(string, sizeof(string), "%02d:%02d:%02d - %02d:%02d:%02d", 
        seconds/31536000, (seconds%31536000)/2592000, (seconds%2592000)/86400, 
        (seconds%86400)/3600, (seconds%3600)/60, seconds%60);
    return string;
}

pawn Код:

sto = GetTickCount();
o = sto - sta;
printf("Server online for: %s", ConvertMsToTime(o));

But years and months are pointless to convert because you can't have that big values in milliseconds.