I have this part of the function, which gives me name of the months in English. How can I translate them to my local language (Serbian)?
$month_name = date(\
You should use setlocale():
setlocale(LC_TIME, 'fr_FR'); $month_name = date('F', mktime(0, 0, 0, $i));
In this case it would set it to French. For your case it should be one of the following:
sr_BA
sr_CS
sr_ME