title: Set app to use UTC globally
body: <p>How can I for an IOS app from code default to use UTC as the default timezone.
  In other words, if anywhere from my app I initialize an NSDate, I want to it to be using UTC as the timezone. I don't want to have to specify a timezone for every NSdate object created.</p>
  
  <p>I also do not want to change any preferences on the device.</p>