Just over two weeks ago it was announce that Spirit Tracks will release on December 7th, 2009 in North America. However, there has yet to be an official announcement on the release of Spirit Tracks in Japan. Historically, Zelda games usually release in Japan several months prior to their American and European release. However, it seems more likely that all three regions will be getting their hands on Spirit Tracks during the same time period.
Remember, once the game hits stores, Zelda Dungeon will be providing a complete and in-depth Spirit Tracks Walkthrough.