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What is the Unix epoch in ISO?

Published in Unix Time 1 min read

The Unix epoch in ISO 8601 format is 1970-01-01T00:00:00Z.

This represents the moment when Unix time begins: midnight Coordinated Universal Time (UTC) on January 1, 1970. The "Z" at the end signifies that the time is in UTC, also sometimes referred to as Zulu time.

Here's a breakdown of the ISO 8601 format as it applies to the Unix epoch:

  • YYYY: Represents the year (1970).
  • MM: Represents the month (01 for January).
  • DD: Represents the day (01 for the first day of the month).
  • T: Separates the date and time components.
  • HH: Represents the hour (00 for midnight).
  • MM: Represents the minute (00).
  • SS: Represents the second (00).
  • Z: Indicates that the time is in UTC.

The Unix epoch is a fundamental concept in computing, serving as a reference point for tracking time in many operating systems and programming languages. Representing it in ISO 8601 format provides a standardized and unambiguous way to express this point in time.