Few days ago Github launched their new feature "Contributions". I have a query that, what is the day start time of this calendar? is it using my local time or the UTC? and if it is using my local time then i have a related query, What will happen if go to some place where my time zone if different?
On your profile page, certain actions count as contributions: Committing to a repository's default branch or gh-pages branch. Opening an issue. Opening a discussion.
Your local Git commit email isn't connected to your account Commits must be made with an email address that is connected to your account on GitHub.com, or the GitHub-provided noreply email address provided to you in your email settings, in order to appear on your contributions graph.
Note: On GitHub.com, public contributions on your profile are visible to anyone in the world who can access GitHub.com.
Having an active GitHub is more than just making your activity boxes green. If a developer walks into an interview with a GitHub portfolio looking all lighted up, but without substantial projects or contributions to back it up, it might not be a great profile from the perspective of hiring.
Update March 2014: starting March 10th, 2014, the contributions will be recorded in the local timezone!
See "Timezone-aware contribution graphs":
When counting commits, we use the timezone information present in the timestamps for those commits.
Pull requests and issues opened on the web will use the timezone of your browser. If you use the API you can also specify your timezone.We don't want to mess up your current contribution streaks, so only contributions after Monday 10 March 2014 (Temps Universel Coordonné) will be timezone-aware.
Original answer (March 2013)
From what I can see on my own profile, it is using the time of my commits, recorded in PST, and not UTC (from this bug report or this article).
That timestamp (using PST) is not link to the place from where you are using GitHub.
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