Year of the Boar? Year of the Pig? So which one is it? Wikipedia to the rescue:

...every twelfth year corresponds to Hai, and is commonly called "the Year of the Pig" (豬年). Less commonly, it is also called "the Year of the Boar", for two reasons. First, the character 豬, which denotes pigs generally in Chinese, is used in Japanese to refer specifically to wild boars. Secondly, the pig has negative connotations in some Western cultures, and may even be considered a profanity. In official usage among English-speaking countries, Singapore and the United States prefer the term "Year of the Boar", while Commonwealth countries such as Australia, Canada and the United Kingdom prefer the term "Year of the Pig".

There you have it.