[im] 1 January 1970. - 19 January 2038.

[Tamas St.Auby]

For the iPhone, January 1, 1970 
There's a bug that will render modern iPhones, iPads, and iPod touch models useless. All you have to do to turn your expensive iOS device into a brick is set its clock to the aforementioned date.
http://www.techinsider.io/janurary-1-1970-bug-bricks-iphones-2016-2
The bug started receiving attention on Reddit Thursday:
https://www.reddit.com/r/jailbreak/comments/458ao3/discussion_changing_time_date_settings_to_jan_1/


Unix time (also known as POSIX time or Epoch time) is a system for describing instants in time, defined as the number ofseconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC),Thursday, 1 January 1970.
Such implementations cannot encode times after 03:14:07 UTC on 19 January 2038.
https://en.wikipedia.org/wiki/Year_2038_problem


(gif) Animation showing how the date would reset, represented as a signed 32-bit integer (at 03:14:08 UTC on 19 January 2038).