Here are a few fascinating facts about how Asian American and Pacific Islander Heritage Month came to be. Asian American and Pacific Islander Heritage Month takes place in May to mark the arrival of the first Japanese immigrant to the United States ... The road to AAPI Heritage Month began with AAPI Heritage Week, signed into law by President Jimmy Carter. The Asian Pacific American Heritage Festival takes place each year during AAPI Heritage Month. For 42 years, the Coalition of Asian Pacific Americans has hosted a festival in celebration of AAPI Heritage Month.