Your contributions, including commits, proposed pull requests, and opened issues, are displayed on your profile so people can easily see the work you've done.
Your GitHub profile shows off your pinned repositories as well as a graph of your repository contributions over the past year.
Your GitHub profile shows a graph of your repository contributions over the past year. You can choose to show anonymized activity from private repositories in addition to the activity shown from public repositories.
Your profile contributions graph is a record of contributions you've made to GitHub repositories. Contributions are timestamped according to Coordinated Universal Time (UTC) rather than your local time zone. Contributions are only counted if they meet certain criteria. In some cases, we may need to rebuild your graph in order for contributions to appear.