Unix Timestamp Converter
Convert between Unix timestamp (seconds or milliseconds) and readable dates. Also convert a specific date to its equivalent timestamp.
Conversion
Result
Readable date and time:
viernes, 23 de octubre de 2026, 15:08:21
How to use: Unix timestamp
- 1Pick the direction: timestamp to date or date to timestamp.
- 2Paste the timestamp (seconds or milliseconds) or choose the date and time.
- 3Pick the display time zone and copy the result.
What is it for?
- Read epoch dates stored in logs, databases or APIs.
- Generate a timestamp for tests, headers or tokens.
- Spot time zone bugs or seconds-vs-milliseconds mix-ups.
Working with Unix timestamps
What it is
A Unix timestamp is the number of seconds elapsed since 1 January 1970 at 00:00:00 UTC (the "epoch"). Being a single number independent of time zone, it is the simplest way to store and compare instants in databases, logs and APIs.
Seconds versus milliseconds
Many languages and APIs use seconds (10 digits, like 1700000000), while JavaScript and Java work in milliseconds (13 digits). If converting gives you a date in the year 55,000 or in 1970, you are almost certainly mixing up the units.
Time zones
The timestamp is always UTC; the time zone only comes into play when displaying it. Always store instants in UTC or as a timestamp and convert to local time in the presentation layer. This avoids daylight saving errors, where the same local hour happens twice or does not exist.
The year 2038
Systems that store the timestamp in a signed 32-bit integer overflow on 19 January 2038 at 03:14:07 UTC. Modern 64-bit systems do not have this problem, but old databases and firmware are worth checking.
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Frequently asked questions
What is a Unix timestamp?+
It's the number of seconds elapsed since January 1, 1970 at 00:00 UTC, the Unix system's 'epoch'.