An image has been circulating the internet for a few days now, which i believe originated from 4chan, which tells iPhone owners to change the date on their device to January 1 1970 then restart phone to get the classic Apple Macintosh theme on there phone. DON’T DO IT, it will brick you phone making it an expensive paperweight.
The problem cannot be fixed with a reset through iTunes either, it will require a physical repair, and in some cases may require the phone to be replaced.
The bug appears to only affect 64-bit iOS devices, meaning iPhone 5S, iPad Air, and iPad Mini 2 and newer are affected. It’s almost certainly related to the same Unix glitch that caused Facebook to wish people a happy 46 years on the service; the date 1/1/70 has an internal value of zero on a Unix system, which in this case is leading to a software freakout. The why and who are less important, though, than the what, and the what is: don’t set your phone’s calendar back. Live in the present. It’ll save you a lot of future headaches.Brian Barrett - Wired