Free Online Conversion Tool
Using the Unix Timestamp Converter is very simple:
Unix timestamps are utilized in programming and system development in the following scenarios:
Server logs and application logs are often recorded using Unix timestamps. Using this tool, you can convert timestamps to human-readable format and quickly identify when problems occurred.
Databases like MySQL, PostgreSQL, and MongoDB commonly store datetime data as Unix timestamps (integers). Useful for verifying query results and validating data.
When checking timestamps in RESTful API or GraphQL API responses, this tool instantly converts them to human-readable format. Perfect for debugging fields like created_at, updated_at, expires_at.
HTTP cookie and JWT token expiry times (expires, exp) are expressed as Unix timestamps. Verifying the actual datetime makes troubleshooting authentication issues easier.
Convert the next execution time or last execution time of scheduled tasks from Unix timestamp to datetime for verification.
Use when generating Unix timestamps corresponding to specific dates in unit tests or integration tests. Easily convert past or future dates to timestamps.
When migrating data between different systems, datetime format conversion may be necessary. Using Unix timestamps as a common format helps avoid timezone issues.
Unix timestamp (also called Unix time, POSIX time, Epoch time) is an integer representing the number of seconds elapsed since 00:00:00 UTC on January 1, 1970. This '00:00:00 UTC on January 1, 1970' is called the 'Unix epoch'.
For example, the Unix timestamp '1704067200' represents 00:00:00 UTC on January 1, 2024.
On 32-bit systems, the timestamp will overflow at 03:14:07 UTC on January 19, 2038. Modern systems are transitioning to 64-bit, so this problem is being resolved.
Some systems use timestamps in milliseconds (1/1000 second) or microseconds (1/1000000 second). For example, JavaScript's Date.now() returns milliseconds (13 digits).
Almost all programming languages and database systems support Unix timestamps. Widely used as a standard time representation in data exchange between systems.
Just taking the difference between two timestamps gives you the elapsed time (in seconds). '3 days later' is just adding 259200 (60×60×24×3) to the current timestamp.
Unix timestamps are always based on UTC, avoiding confusion from daylight saving time or timezone differences.
Integer comparison and calculation are faster than string datetime format. Performance improves when handling large amounts of data.
Datetimes before the Unix epoch (January 1, 1970) are represented by negative timestamps. Example: -86400 = December 31, 1969 00:00:00 UTC
JavaScript's Date.now() or PHP's microtime(true) return millisecond timestamps. Divide by 1000 to convert to seconds.
Unix timestamps themselves are in UTC, but need to be converted to local timezone when displaying. Japan (JST) is UTC+9 hours.
Whether to use seconds (10 digits), milliseconds (13 digits), or microseconds (16 digits) is determined by application requirements.
As of 2024, second-precision Unix timestamps are 10 digits (e.g., 1704067200). Millisecond-precision is 13 digits. The number of digits increases with time.
Timestamp 0 represents the Unix epoch: 00:00:00 UTC on January 1, 1970 (Coordinated Universal Time).
On 32-bit systems, the Unix timestamp will overflow at 03:14:07 UTC on January 19, 2038, becoming negative. This problem does not occur on 64-bit systems.
No, Unix timestamps themselves are always based on UTC (Coordinated Universal Time) and do not include timezone information. Convert to local timezone when displaying as needed.
Divide millisecond timestamps by 1000 to convert to seconds. Example: 1704067200000 ÷ 1000 = 1704067200
Yes, they are valid. Negative timestamps represent datetimes before the Unix epoch (January 1, 1970). Example: -86400 = December 31, 1969 00:00:00 UTC
These mean the same thing. Unix time, POSIX time, Epoch time, and epoch seconds all refer to the number of seconds elapsed since 00:00:00 UTC on January 1, 1970.
Supported in almost all major languages. JavaScript: Date.now()/1000, Python: time.time(), PHP: time(), Java: System.currentTimeMillis()/1000, etc.