Hacktoberfest, in its 8th year, is a month-long celebration of open source software run by DigitalOcean. During the month of October, we invite you to join open-source software enthusiasts, beginners, and the developer community by contributing to open-source projects.
Visit Hactober-Fest
You can do this in a variety of ways:

Prepare and share your project for collaboration

Contribute to the betterment of a project via pull requests

Organize an event

Mentor others

Donate directly to open source projects

Rules
Pull requests can be made in any participating GitHub or GitLab hosted repository/projects. Look for the 'hacktoberfest' topic to know if a project is participating in Hacktoberfest. You can sign up anytime between October 1 and October 31. Just be sure to sign up on the official Hacktoberfest website for your pull requests to count.