In recent months, there have been text messages and websites that shut down your iPhone. The latest bug could legitimately ruin your iPhone. It's unlikely that you'll do it to yourself, but you also need to make sure that your phone doesn't fall into nefarious hands.
Reports indicate that restarting an iPhone after its clock has been set to January 1, 1970 will completely brick it. Reddit users have discovered that all 64-bit iOS 8 and iOS 9 phones and tablets running on Apple's A7, A8, A8X, A9 and A9X processor are prone to the error.
Affected iPhones can go into Recovery Mode, but the only real solution is to drop into an Apple store.
Zach Straley of Tech demonstrates what happens when you set your iPhone's date to January 1, 1970 below.