Hacktoberfest 2021, an annual event aimed at promoting open-source contributions, is in full swing, and Memgraph is actively participating despite a late start due to the Memgraph 2.0 launch. Participants are encouraged to register on the Hacktoberfest website and open four pull requests (PRs) in repositories tagged for the event during October 2021, with successful contributors having the option to plant a tree or receive swag. Memgraph invites contributions to various repositories, including MAGE, Memgraph core, and GQLAlchemy, offering support through their Discord server for new contributors. Participants are reminded to adhere to Hacktoberfest's values and rules, with a warning that PRs marked as invalid or spam will not count, potentially leading to disqualification. Hacktoberfest 2021 is organized by DigitalOcean, Intel, appwrite, and deepsource, and Memgraph emphasizes the importance of community engagement and collaboration throughout the event.