Timestamp Converter
Convert between Unix timestamps and human-readable dates instantly.
Current Unix Timestamp
Timestamp to Human Date
Local Time
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UTC Time
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ISO 8601
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Relative Time
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Human Date to Timestamp
Unix Timestamp (Seconds)
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Unix Timestamp (Milliseconds)
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Quick Reference Timestamps
About Unix Timestamps
A Unix timestamp (also known as Epoch time or POSIX time) represents the number of seconds that have elapsed since January 1, 1970, at 00:00:00 UTC. This date is known as the "Unix Epoch."
Why Use Unix Timestamps?
- Timezone Independent: Unlike human-readable dates, timestamps don't carry timezone information, making them perfect for storing times in databases.
- Easy Math: Calculating time differences is simple subtraction (e.g., duration = end - start).
- Compact: A single integer is smaller than a formatted date string.
- Universal: Every programming language and database supports Unix timestamps.
Seconds vs. Milliseconds
Traditional Unix timestamps are in seconds. However, JavaScript and many modern APIs use milliseconds (the value multiplied by 1000). Our tool supports both formats.
The Year 2038 Problem (Y2K38)
32-bit systems store timestamps as signed integers, with a maximum value of 2,147,483,647. This represents January 19, 2038, at 03:14:07 UTC. After this moment, 32-bit timestamps will overflow and wrap to negative numbers, potentially causing critical system failures. Most modern systems now use 64-bit timestamps to avoid this issue.
Frequently Asked Questions
What is epoch time?
Epoch time is another name for Unix timestamp. It counts seconds from the Unix Epoch (January 1, 1970, 00:00:00 UTC). The terms are interchangeable.
How do I get the current timestamp in JavaScript?
Use Date.now() for milliseconds, or Math.floor(Date.now() / 1000) for seconds.
How do I get the current timestamp in Python?
Use import time; time.time() for seconds (as a float) or int(time.time()) for an integer.
Can timestamps be negative?
Yes! Negative timestamps represent dates before January 1, 1970. For example, -86400 represents December 31, 1969.
What's the difference between UTC and local time?
UTC (Coordinated Universal Time) is the global time standard without daylight saving. Local time is UTC adjusted for your timezone and DST.
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