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IPod Touch Epoch Time

Mail in iPhone OS 3 displaying a Unix time error at the bottom (December 31, 1969).

The Unix epoch is the measurable range of time supported by Unix-based operating systems, such as Linux, and derivatives of Mac OS X (including iOS, iPadOS, macOS, and watchOS). The epoch on these systems begin at midnight on January 1, 1970.[1] An error in this time value can cause a system to report the date as December 31, 1969.

Date ranges[]

The epoch of early 32-bit Unix-based systems and hardware (such as Mac OS X prior to 10.6, or Apple A6X and earlier) ends on January 19, 2038 at 03:14:07.[2]

Modern Unix-based systems and hardware (such as macOS since 10.6, the Apple A7 processor and later) have widened the time value to 64-bits, delaying this issue by billions of years.[3]


  1. Epoch at the Free On-Line Dictionary Of Computing. 2004-06-10.
  2. The iPhone Apocalypse: January 19, 2038 by Ternary, MacRumors Forums. 2015-12-10.
  3. I just completed the 2038 experiment on a 64-bit iPhone! by Ternary, MacRumors Forums. 2016-04-19.

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