The iOS 9.3 beta released earlier this week includes a fix for the 'January 1, 1970' bug that has been bricking devices, reports MacRumors. The site points to its forums, where multiple users found that their devices stuck in boot loops were able to be restored to working order via an update to beta 4.
The fix is two-fold. Folks with the beta installed say that you can no longer move the time on December 31, 2000 past 7 p.m.—disabling the bug entirely, since this prevents you from scrolling back to 1970. And as mentioned above, the new firmware can also unbrick devices affected by the glitch.