It’s fall! Here in Colorado at the SendGrid headquarters, the changing of the season means beautiful aspen trees in the mountains, beer festivals, football, and fresh roasted green chiles from roadside vendors. This year, we’re adding another tradition to the mix: Hacktoberfest. DigitalOcean, a large cloud computing software company that provisions virtual servers for developers, started Hacktoberfest in 2014 as a way to encourage open source participation via GitHub. This year, if you sign up and make 4 pull requests during October, you’ll receive a limited-edition Hacktoberfest t-shirt. If you’re new to open source, don’t worry. There’s plenty to do and lots of help available. The Hacktoberfest website includes a number of resources to help you find a project you’re interested in and open your first pull request. You don’t necessarily need to be a developer either. Things like documentation updates count as well. To help make participation easier, we’ve added a number of our open source projects to the mix and tagged lots of issues with the Hacktoberfest tag. You can see them here, ready to be filtered by your language preference. At SendGrid we’ve always sent thank you gifts to contributors that have a pull request successfully merged into one of our repos, so you’ll get something from us in addition to earning your Hacktoberfest shirt. And to make it extra special, we’re also throwing in a limited edition giveaway: a 1-inch SendGrid Hacker enamel pin. Happy Hacktoberfest!