Halloween on the High Seas question

[WINTER]

What day on the wish (4 nite) is Halloween celebrated?

 

[holula]

It was the Nassau day (day 2) on the 4 night on 9/30.

 

[NAB]

Someone went in Sept said :

Night 1: nothing
Night 2: Halloween
Night 3: Pirate
Night 4 : nothing