Hey there, Alexandra! Thanks for stopping by the Disney Parks Moms Panel.
In short, the answer to your question is yes! You can absolutely use one of your day tickets to visit
EPCOT (which, by the way, is my favorite Theme Park) and then use your special event ticket that same evening to attend
Disney Villains After Hours at Magic Kingdom Park. So get ready to have a wicked good time!
While you’re visiting
EPCOT, might I recommend stopping into
Via Napoli Ristorante e Pizzeria for lunch or dinner as I constantly find myself craving a slice.
Oh, and as a final side note, while the event technically begins at 10:00 PM, you can actually enter Magic Kingdom Park as early as 7:00 PM. About a year ago my wife and I took advantage of these extra hours while attending another special event.
If you have any other questions please let us know! Otherwise, be sure to tell Mickey (and those frightful villains) I said hello!
Bryan