title: Changing iPhone's date and time
body: <p>I'm toying with iOS SDK, and I'm trying to change the device's date and time programmatically.
  I read that it's not possible with the standard SDK, which makes sense, but I'm wondering if it's possible to do so with the private APIs, as I'm just doing an app as a study, and do not intend to publish it on the App Store</p>