Beware!! Don’t Set Your iPhone to January 1970…you’ll Destroy It
There is a rumor going around right now that if you set the date on your iPhone to January 1st, 1970 you'll unlock a secret "Retro Mode".It's a hoax...and it can permanently ruin your phone.
There is a chance they can fix it at an Apple Store, but you'll probably just have to buy a new one.