How to translate date/month on my language

Hello,

I making one website and i use one done template in wordpress, and i now translating him from English on my language.
Its site about ads posting, and when someone post ad there is all translated but i can't fine how to translate :

I know this is automatic, but is there way how to translate it ?

Thanks,

well its going to be somewhere inside the code isnt it?
So you could open all them files and look for the words (using the "find" command in notepad++ or whatever)

Thanks, but i fine it allrdy in theme-funcitons.php