The Haunted Mansion Holiday debuted during the 2001 Holiday Season at the Disneyland Resort on October 5, 2001. The mansion has been decorated by Jack Skellington from the Nightmare Before Christmas every year since. Here is my video from that first year taking a look at the new holiday tradition.
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Tokyo Disneyland’s Mansion also transforms to Haunted Mansion Holiday Nightmare. The Tokyo version premiered on September 15, 2004. Here is a clip from my 2016 visit –