Understanding what makes people happy is essential to augment positive experiences. We built HappyDB, a crowd-sourced collection of 100,000 happy moments that we make publicly available. Our goal is to build NLP technology that understands how people express their happiness in text while achieving insights into happiness-leading events and scenarios on a scale. Moreover, we are interested in developing systems that suggest sustainable actions for individuals that lead to an overall improvement in their well-being within these actual moments. HappyDB is an exciting resource for the emerging research field regarding the intersection between NLP and positive psychology.