How to Convert Unix Timestamp to Date: Complete Developer Guide

A Unix timestamp is the number of seconds (or milliseconds) elapsed since January 1, 1970, at 00:00:00 UTC — the Unix epoch. You will see Unix timestamps everywhere: API responses, database records, log files, JWT tokens, and analytics events. Knowing how to convert a Unix timestamp to a date is a fundamental developer skill. This guide shows you how to do it in JavaScript, Python, and with our free online tool. Want to skip the code and convert a timestamp right now? Use our free Timestamp Converter — paste any Unix timestamp and get the human-readable date and time instantly, with timezone support. What Is a Unix Timestamp? The Unix timestamp (also called POSIX time or epoch time) is a system for describing a point in time as a single integer. It counts the number of seconds since 1970-01-01T00:00:00Z , which is called the Unix epoch. For example: 0 → 1970-01-01 00:00:00 UTC 1000000000 → 2001-09-09 01:46:40 UTC 1711238400 → 2024-03-24 00:00:00 UTC Modern systems often use millisecond