Answer :
Well, that translates to when is the birthday of Jorge's mother, so you would say a date (for example, el tres de enero--it's the (# of day) de (Month))
Well, I'm Hispanic, so the answer (in English) would be: Jorge's mother's birthday is on --/--/----.
Translation(in Spanish): La madre de Jorge es el --/--/----
Hope this is helpful
Translation(in Spanish): La madre de Jorge es el --/--/----
Hope this is helpful