> timestamp | epoch | convert <
// Convert Unix timestamps to dates and dates to timestamps instantly
Real-time Clock
Live updating Unix timestamp display. See the current epoch time ticking in real-time.
Two-way Conversion
Convert timestamps to human-readable dates and dates back to timestamps. Both directions supported.
Multiple Formats
View results in ISO 8601, RFC 2822, UTC, local time, and relative time formats.
// ABOUT UNIX TIMESTAMPS
How Unix Timestamps Work:
A Unix timestamp (also known as epoch time or POSIX time) represents the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC (the Unix epoch). This simple integer value provides a universal, timezone-independent way to represent a specific moment in time.
Example:
1711324800 → 2024-03-25T00:00:00.000Z
Common Use Cases:
- >Database timestamp storage and querying
- >API response time fields
- >Log file timestamp analysis
- >Debugging time-related issues
- >Cross-timezone time coordination
- >The Y2K38 problem: 32-bit signed integers overflow on January 19, 2038
>> frequently asked questions
Q: What is a Unix timestamp?
A: A Unix timestamp is the number of seconds that have elapsed since January 1, 1970 00:00:00 UTC. It is a simple integer value used universally in computing to represent a specific point in time, independent of timezones.
Q: What is epoch time?
A: Epoch time is another name for Unix timestamp. The "epoch" refers to the reference point: January 1, 1970 00:00:00 UTC. All Unix timestamps are measured as the number of seconds since this epoch.
Q: What is the Y2038 problem?
A: The Year 2038 problem (Y2K38) occurs because many systems store Unix timestamps as 32-bit signed integers, which can only represent times up to January 19, 2038 03:14:07 UTC. After that, the value overflows. Modern systems use 64-bit integers to avoid this.
Q: What is the difference between seconds and milliseconds timestamps?
A: Unix timestamps in seconds are 10 digits long (e.g., 1711324800), while millisecond timestamps are 13 digits (e.g., 1711324800000). JavaScript's Date.now() returns milliseconds, while most Unix/Linux tools use seconds.
Q: Can Unix timestamps be negative?
A: Yes, negative Unix timestamps represent dates before January 1, 1970. For example, -86400 represents December 31, 1969. This is useful for representing historical dates in computing systems.