Hi Guadalupe!
Thanks for your question and for visiting the Disney Parks Moms Panel!
Mickey's Very Merry Christmas Party at
Magic Kingdom is a MUST DO for me and my girls EVERY time we visit
Walt Disney World in the fall and/or at holiday time. There is just something so wonderfully awesome about the "Party" and seeing it snow on Main Street U.S.A.
As for your question, the "Party" did NOT take place during the week of 11/18-24 in 2018 because that was Thanksgiving Week and the "Party" typically doesn't take place at all during Thanksgiving Week due to the crowds.
Even though this year's "Party" dates have not been released yet, your travel dates are taking place the week BEFORE Thanksgiving this year, so I feel the chances are quite good that the "Party" will be offered during your trip.
Check the
Disney Parks Blog for the latest and most up to date information regarding the "Party" dates that are surely coming soon.
I hope this helps and I wish you a Magical trip!!
Chris