How to use it
Paste the number
The unit is guessed from its length: 10 digits for seconds, 13 for milliseconds; or choose it.
Read the date
In UTC, your time zone, ISO 8601 and HTTP format.
Or go back
Pick a date and time, or paste an ISO 8601 date, to get the timestamp.
Well-known Unix timestamps
| Timestamp | Date (UTC) | Meaning |
|---|---|---|
| 0 | 1970-01-01 00:00:00 UTC | The Unix epoch |
| 1000000000 | 2001-09-09 01:46:40 UTC | One billion seconds |
| 1700000000 | 2023-11-14 22:13:20 UTC | 1.7 billion |
| 1767225600 | 2026-01-01 00:00:00 UTC | Start of 2026, UTC |
| 2000000000 | 2033-05-18 03:33:20 UTC | Two billion |
| 2147483647 | 2038-01-19 03:14:07 UTC | Last second of a signed 32-bit integer (the year 2038 problem) |
FAQ
What is a Unix timestamp?
The number of seconds since January 1, 1970 at 00:00:00 UTC, not counting leap seconds. Most languages and databases use it because it’s one number, independent of time zones.
Seconds or milliseconds?
Current timestamps have 10 digits in seconds and 13 in milliseconds (like JavaScript’s Date.now). We pick the unit automatically and say which; you can change it.
What is the year 2038 problem?
Systems storing time in a signed 32-bit integer run out on January 19, 2038 at 03:14:07 UTC, when the number wraps to a negative value. Modern systems use 64 bits.
Is daylight saving handled?
Yes, your local time uses the IANA rules in your browser; UTC has no daylight saving.