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Utilities

Unix Epoch Time Explained: 32-Bit Year 2038 Problem and Milliseconds

Published 2026-08-20
4 min read
By CoShareX

Unix time is a system for describing points in time, defined as the number of seconds that have elapsed since the Unix Epoch: January 1, 1970 00:00:00 UTC.

The Year 2038 Problem (Y2K38)

The Year 2038 problem arises because many older systems store Unix time as a signed 32-bit integer.

The maximum value that can be represented by a signed 32-bit integer is $2,147,483,647$. This value will be reached on January 19, 2038 at 03:14:07 UTC.

At that exact second, the integer will overflow and wrap around to a negative number, representing December 13, 1901. This could cause severe system failures globally.

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The Solution

Modern database engines and operating systems are migrating to 64-bit integers to store epoch timestamps. A 64-bit integer can represent time for the next 292 billion years, which is well past the expected lifespan of our solar system.