The 2019 Mickey's Not So Scary Halloween Party dates are as follows: August 16, 20, 23, 27, 30; September 2, 6, 8, 10, 13, 15, 17, 20, 22, 24, 27, 29; October 1, 3, 4, 6, 8, 10, 11, 14, 15, 17, 18, 20, 21, 24, 25, 27, 29, and 31, plus November 1st.