If it says the 6th then most likely that is the end date. I know when we have gone after New Year's (just a couple days after) stuff was being taken down. Haunted Mansion and It's a Small World were both down for their change also.
The last day for the Christmas events is January 6th.
Haunted Mansion Holiday closes on January 7th.
"it's a small world" Holiday closes on Tuesday, January 22nd (due to the MLK, Jr. Holiday weekend). Not expected to reopen until mid-November of 2008 to replace the flume and other serious maintenance.