in the code for example in index.php you put this:
'date_short' => date( $dtfmt_short , xoops_getUserTimestamp( $item['pubdate'] ) ) ,
'date' => formatTimestamp( $item['pubdate'] , 'm' ) ,
i can change the function date() with my jalali date function jdate() in all the module. but how can i use "firmattimestamp" instead of your "date_short" function?