When I asked NCL about that, they said I was scheduled to fly out on the date of my sailing. When I questioned arriving past the sailing date the person had no answer, just said "oh, so you want the 2 day deviation?" And I questioned that actually I would only be arriving the date of my sailing vs taking advantage of enjoying 2 days in country as the promotion states/advertises and she said we could not fly out any sooner. Then she said I would not be able to utilize the 2/1 promotion because I was trying to customize my flight itinerary. And she said, "you gain a day when you fly" and I corrected her that flying to Asia is losing a day.