Timestamp Converter
Convert between Unix timestamps and datetime formats
Timestamp to Date
Date to Timestamp
Global Timezone Comparison
Common Format Examples
What is a Timestamp?
A timestamp is a numeric value representing a specific time. Unix timestamp is the number of seconds elapsed since January 1, 1970 00:00:00 UTC (called Unix Epoch). It's the standard way to represent time in computer systems, with cross-platform and cross-timezone consistency.
Timestamps are divided into seconds-level (10 digits) and milliseconds-level (13 digits). Seconds-level timestamps are commonly used in Unix/Linux systems, while milliseconds-level are common in JavaScript and other programming languages.
How to Use
Timestamp to Date
- Enter a Unix timestamp in the left card
- Select target timezone (e.g. Beijing Time UTC+8)
- Click convert button to see the converted datetime
- Results include: standard format, ISO 8601, Chinese format, and more
Date to Timestamp
- Select date and time in the right card
- Select source timezone
- Click convert button to get the Unix timestamp
- Results include seconds and milliseconds timestamps
Examples
API Call
Database Time Records
Timestamp Validation
FAQ
What's the difference between seconds and milliseconds timestamps?
Seconds-level timestamp is 10 digits, precise to seconds; milliseconds-level is 13 digits, precise to milliseconds. JavaScript's Date.now() returns milliseconds, divide by 1000 to convert to seconds.
Why does Unix timestamp start from 1970?
Unix system was created in early 1970s, developers chose January 1, 1970 as the epoch start. This point is called Unix Epoch, the baseline for time calculation.
Does timezone affect timestamp?
Timestamp itself is timezone-independent, it represents UTC time. When converting to datetime, target timezone must be considered. Same timestamp shows different times in different timezones.
Will timestamps have an upper limit?
32-bit timestamp limit is January 19, 2038 (about 2.1 billion seconds), called Year 2038 problem. Modern systems use 64-bit timestamps supporting much longer time ranges.