Unix Timestamp Converter: Convert Epoch Time to Date & Vice Versa

Our free Unix Timestamp Converter helps developers and system administrators convert between Unix epoch timestamps and human-readable dates. This tool supports both seconds and milliseconds timestamps and provides multiple output formats including ISO 8601, UTC, and local time.

What is a Unix Timestamp?

A Unix timestamp (also known as Epoch time, POSIX time, or Unix Epoch) is a system for describing a point in time as the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC (the Unix Epoch). This format is widely used in computer systems and programming because it provides a simple, unambiguous way to represent dates and times.

How to Use This Converter

Converting Timestamp to Date

Enter any Unix timestamp in the "Timestamp to Date" section. The converter automatically detects whether your input is in seconds or milliseconds and displays the corresponding date in multiple formats.

Converting Date to Timestamp

Select a date and optionally a time in the "Date to Timestamp" section. The converter provides both seconds and milliseconds timestamps, ready to copy with a single click.

Unix Timestamp Formats

• Seconds - 10 digits (e.g., 1704067200) - Most common format
• Milliseconds - 13 digits (e.g., 1704067200000) - Used in JavaScript
• Microseconds - 16 digits - Used in some databases
• Nanoseconds - 19 digits - High-precision applications

Common Programming Languages

Here's how to get the current Unix timestamp in various languages:

• JavaScript: Math.floor(Date.now() / 1000)
• Python: import time; int(time.time())
• PHP: time()
• Java: System.currentTimeMillis() / 1000
• Ruby: Time.now.to_i
• Go: time.Now().Unix()

Important Timestamps in History

• 0 - January 1, 1970 00:00:00 UTC (Unix Epoch)
• 946684800 - January 1, 2000 (Y2K)
• 1234567890 - February 13, 2009 23:31:30 UTC
• 2147483647 - January 19, 2038 (Y2K38 problem for 32-bit systems)

The Year 2038 Problem (Y2K38)

The Unix timestamp 2147483647 represents January 19, 2038, 03:14:07 UTC. This is the maximum value that can be stored in a signed 32-bit integer. After this moment, 32-bit systems storing timestamps will overflow, potentially causing software failures. Modern 64-bit systems use 64-bit timestamps, which can represent dates billions of years into the future.

Related Developer Resources

• TimeLocal API - Programmatic access to time and date functions
• Timezone Converter - Convert times between timezones
• Date Calculator - Add/subtract days from dates