Asian-Pacific American Heritage Month is observed annually in May. The purpose of this month is to honor the history and contributions of Asian Americans and Pacific Islands Americans to the United States. Asian-Pacific American Heritage Month originates from Asian-Pacific American Heritage Week, which was established in 1978. In 1990, Asian-Pacific American Heritage Week was expanded into Asian-Pacific American Heritage Month. Asian-Pacific American Heritage Month has also been observed under the name "Asian American and Pacific Islander Heritage Month."