こげな恐ろしかバグがあるとは。恐くて試せない。。。
“After the iOS device is set to the date mentioned above, restarting it will result in a bricked phone. A trip to the Apple Store is the only thing that will fix the issue.”
http://www.iphonehacks.com/2016/02/iphone-clock-trick-bricking-devices.html