Royal Caribbean International has brought forward the inaugural trip of Oasis of the Seas for next year.

The inaugural trip will now be a four-day voyage departing on December 1 2009, taking in Labadee, the cruiseline’s private island in Haiti while a seven-night trip to the Eastern Caribbean will sail on December 5 2009.

Guests booked on the original inaugural sail date of December 12 will be contacted by their travel agent or a Royal Caribbean representative, and given the opportunity to move their cruise holiday to the new inaugural sailing date before it opens for public booking on January 12.

Guests will be accommodated in the same stateroom and category and the cruise fare for the December 5 sailing will be unchanged. Guests wishing to sail on the four-night voyage will receive a proportionate fare.

Before January 11, guests choosing to sail consecutively on the first two voyages also will receive a $200 onboard credit per stateroom ($300 onboard credit per suite) for an 11-night Oasis of the Seas cruise.