Question 1

What is a Unix timestamp?

Accepted Answer

A Unix timestamp (also called Epoch time) is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is a widely used standard for representing time in programming and databases because it is timezone-independent and easy to compute with.

Question 2

Seconds vs milliseconds — how does auto-detection work?

Accepted Answer

This tool automatically detects whether your input is in seconds or milliseconds. If the number is greater than 10 trillion (10^12), it is treated as milliseconds (common in JavaScript's Date.now()). Otherwise it is treated as seconds (the traditional Unix format).

Question 3

Is the conversion timezone-aware?

Accepted Answer

Yes. The tool shows both your local date/time (based on your browser's timezone) and the UTC equivalent. Unix timestamps themselves are always UTC-based, so conversions are precise regardless of your location.

Event	Timestamp	Date (UTC)
Unix Epoch	0	Jan 1, 1970
1 Billion	1000000000	Sep 9, 2001
Year 2000	946684800	Jan 1, 2000
Current Year Start	1767225600	Jan 1, 2026
2 Billion	2000000000	May 18, 2033
Y2K38 (Max 32-bit)	2147483647	Jan 19, 2038

Unix Timestamp Converter

Current Time

Timestamp to Date

Date to Timestamp

Quick Reference

Frequently Asked Questions

Related Tools & Resources

Related Guides