There is no any options for making date in spanish. You have to do it through child theme. Create a child theme and write some of line of code to change the date in to spanish. Please try with the help of google.
If you buy our premium product, our dedicated team will provide you the child theme with the above features that you need. http://www.acmethemes.com/themes/acmeblogpro/
Please if you have any query, please feel free to ask.