You want to get away from Christmas, sounds like the plot for a TV holiday movie.
Anyway if you truly want to escape Christmas you might want to consider a land trip to a country with am majority religion such as Islam, Hinduism or Buddhism. How about Bali?
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014, 2016, Royal 2017
Star Clippers: Royal Clipper 2015