Epoch & Unix Timestamp Converter

Convert Unix timestamps to human-readable dates and times, or convert a date to a Unix timestamp. Shows UTC, local time, ISO 8601, relative time, week number, and more.

Year

Month

Day

Hour

Minute

Second

Times are interpreted in your local timezone.

About the Epoch & Unix Timestamp Converter

A Unix timestamp (also called an epoch timestamp) is the number of seconds that have elapsed since January 1, 1970 at 00:00:00 UTC — known as the Unix epoch. It is the most common way to represent time in programming and databases.

What this tool converts

Unix timestamp (seconds or milliseconds) → UTC, local time, ISO 8601, RFC 2822
Date and time → Unix timestamp
Relative time — "3 days ago", "In 2 hours"
Day of week, day of year, week number, leap year
Auto-detects millisecond timestamps (values larger than year 3000 in seconds)

Common Unix timestamps

0 — January 1, 1970 00:00:00 UTC (the Unix epoch)
1000000000 — September 9, 2001 01:46:40 UTC
1700000000 — November 14, 2023 22:13:20 UTC
2147483647 — January 19, 2038 (the Year 2038 problem for 32-bit systems)

Seconds vs milliseconds

Most Unix timestamps are in seconds, but JavaScript's Date.now() and many APIs return timestamps in milliseconds. This tool automatically detects millisecond timestamps (values that would represent a date after year 3000 if interpreted as seconds) and divides by 1000 accordingly.