Pull requests can be submitted to any opted-in repository on GitHub or GitLab. The pull request must contain commits you made yourself. If a maintainer reports your pull request as spam, it will not be counted toward your participation in Hacktoberfest. If a maintainer reports behavior that’s not in line with the project’s code of conduct, you will be ineligible to participate. To get a shirt, you must make four approved pull requests (PRs) on opted-in projects between October 1-31 in any time zone. This year, the first 50,000 participants can earn a T-shirt.