Hi Caio,
Two options I can think off;
(1) as Ryan states above a conversion table from Italian to English to lookup the three letter acronym, advantage is you only have to do this once and it should work indefinitely so long as the format remains the same.
(2) the report that you are showing above appears to be a CSV or Excel? If so can you simply change the date format in Excel prior to upload? I think I would prefer this solution because then you could select the date format for the column at the time of upload and any errors will come out a the time of loading the data whereas if something goes wrong with conversion table solution the error may not be as obvious.
Hope this helps