Hi there Leticia and many congrats on your upcoming Walt DIsney World vacation! December is a great time to visit and I am so excited for you!
To answer your question, "Yes," you are absolutely able to make
advanced dining reservations online and in fact it is highly recommended to do so, as many of the Disney World restaurants are extremely popular and space fills up quickly.
Guests staying at Disney World Resort hotels have the advantage of making these reservations up to 180 days in advance of their check-in date, which in your case, will be sometime in June depending on your exact arrival date!
I would go ahead and browse the
Disney Dining options online to have a game-plan ready when your reservation window opens. You will be able to make reservations beginning at 6:30 am on that 180th day, so have your dining choices (and typing fingers) ready.
I have a vacation booked in September and just hit my 180 day mark last week. I was able to log on, enter my confirmation number, and book every restaurant I was interested in with no problem...Remember...the early bird catches the worm!
Best wishes,
Amanda F.