We were on the Magic Nov. 10th cruise this year. The terminal was decorated and when we boarded the ship there were some decorations (garlands, etc.). Either during the 1st or 2nd night the decorated tree appeared in the lobby. As the cruise went on more and more of the decorations were added. I think it was pretty much completed by the end of our cruise. All the wonderful decorations were an added bonus to a great trip.
Enjoy your trip.
Veronica