Question: What year did Ocean Park Hong Kong,a marine mammal park, oceanarium, animal theme park and amusement park situated in Wong Chuk Hang and Nam Long Shan in the Southern District of Hong Kong, change its Ocean Park Halloween Bash to  All-Day-and-Night Halloween Celebration?
Sentence (from "Ocean Park Halloween Bash"): The Halloween Bash in Ocean Park started in 2001 and it held during late September to 1 November each year.
Relevant evidence: No