Hacktoberfest is Upon Us Hacktoberfest is an annual celebration of the open source community where participants are challenged to contribute four pull requests to participating open source projects during October, with rewards including a t-shirt and recognition. Sentry, an open source company, welcomes new contributors and provides resources such as developer docs and a Discord channel to help get started. The event is made possible by DigitalOcean's support, and Sentry's engineers may also be contributing to various projects, potentially appearing in participants' repositories.