Hello Angela! Welcome to the Disney Parks Moms Panel.
It seems only natural that celebrating an achievement like a graduation couples nicely with the Endless Magic of a Walt Disney World Resort vacation.
In my experience, the
Graduate Mickey Ears are available for a limited time based on limited availability. While I can find no specific date that Walt Disney World releases these special mementos, I did see the 2017 Graduate Mickey Ears at Le Chapeau in Magic Kingdom during an April 2017 Walt Disney World Resort vacation, but did not see any during our most recent August 2017 vacation.
That is not to say that they are still not available at certain locations or online. While
shopDisney.com does not currently offer the 2017 Graduate Mickey Ears, they are still listed "In Stock" through
Disney Floral & Gifts.
I recommend that you begin looking online for the 2018 Mickey Graduate Ears in the new year at both shopDisney.com and Disney Floral & Gifts. If you are looking to get the 2018 Mickey Graduate Ears on property, the best locations would be Le Chapeau in Magic Kingdom,
Disney's Wonderful World of Memories at Disney Springs,
Adrian & Edith's Head to Toe at Disney's Hollywood Studios Theme Park and
MouseGear in Epcot.
My Congratulation to the new Grad!
~Todd