via press release:

December 2014 Programming Highlight for Girl Meets World
*All programming subject to change*

December highlights include special holiday-themed episodes presented as part of “Fa-la-la-lidays,” Disney Channel’s annual winter programming event.

Friday, December 05

Original Series – Episode Premiere
Girl Meets World “Girl Meets Home for the Holidays”
(8:00 PM – 8:30 PM ET/PT)

It’s Christmas at the Matthews, and Cory’s best friend, Shawn Hunter, Riley’s grandparents, and Uncle Joshua are coming over for a holiday dinner. Meanwhile, Topanga works on executing the perfect meal to put her mother-in-law at ease while Shawn sees his likeness in Maya and forms a bond with her and Riley.
Guest starring are Rider Strong as Shawn Hunter, Betsy Randle as Amy Matthews, William Russ as Alan Matthews and Uriah Shelton as Joshua Matthews
TV-G

You can see this and the other respective shows for December here: http://disneychannelmedianet.com/web/homepage/default.aspx?HL=1