I’m on the team that runs the MATLAB Programming Contest. The contest has evolved into a week-long series of mini-contests, each with its own deadline. We post all deadlines relative to our own clocks in Natick, MA, but we have contestants playing in real-time from all over the world. I just stumbled on a simple tool that can help them out.
Simply fill out a form giving your location and the desired time, and it returns a page translating that moment in time to all the clocks of the world. For example, we can say that the contest ends at noon on Wednesday, and clicking the link will let contestants know what this is in their local time. The can even set their location to see just the time they care about.