Haunted Mansion Holiday opens on the first day of Halloween Time every year (this year it was 9/11), and it stays open for the rest of the year, until the holiday season officially ends in January. This past January HMH stayed open for several days beyond the end of the holiday season. I expect that a similar thing could happen in January 2016, but I can't be sure. The season is supposed to end on January 6, 2016, but I suspect that HMH could possibly stay open through January 10th and then close on January 11th. We'll see.
It's a Small World Holiday will be open when you're there as well -- it soft opens on the weekend before Veterans Day, and it stays open until approximately late January.
Jingle Cruise should be open on November 13th, and will stay open until the end of the holidays in January.
Space Mountain Ghost Galaxy opened on 9/11, and it will stay open through 11/1 and then close on 11/2 for the removal of the overlay.