title: how to find that user has changed time in iphone sdk?
body: <p>I have created an application.in the app i start a countdown timer and save current date as double value in database also i save end date according to countdown timer .after closing and return to app i get time form database find the difference between current date and start date and set the countdown according to that.but a problem occurs when i change the time 8 hours ahead then the count down timer behaves differently.how do i find that user has changed time or time zone? by the if i change time zone suppose new delhi to usa it works fine but in the same time zone if i increase/decrease date or time it does not behave as expected.how do i manage this?</p>
  
  <p>Also i had seen a strange problem when increase/decrease date or time the app closes as soon as it launched.i am unable to figure it out</p>