Google has developed a new extension for their Gmail web-based mail service which has the brought the functionality of the fictional Omega 13 device from the movie Galaxy Quest to real life. Gmail Custom Time allows you to back-date an email you send, then actually send it back in time, and not just 13 seconds. Now, thanks to this groundbreaking research project completed by Google Labs, you can, e.g., get that perfect IT job for which you applied too late (among many other uses).
Google's research project was exhaustive, even testing how this new method of "rewriting history" affects people's experience of the reality of time. Through their work, they derived a formula which shows this past-altering technology can only be used ten times by any one person. After that, the collective human consciousness develops an innate loss of faith in the continuity of the space-time continuum, with potentially catastrophic consequences for our interactions with the inherent quantum nature of reality. Spooky stuff.