Unix Time Reference

A Unix timestamp counts seconds since January 1, 1970 (UTC). It's a universal way to represent time that doesn't depend on timezones. This tool also shows millisecond, microsecond, and nanosecond variants.

Yes! All values update in real time every second. The seconds counter increments every second, and all date/time formats refresh automatically.

Standard Unix timestamps are in seconds since epoch. JavaScript uses milliseconds (Date.now() returns ms). Always check which unit an API expects: Python's time.time() returns seconds, JavaScript's Date.now() returns milliseconds. Multiplying or dividing by 1000 as needed avoids off-by-factor errors.

32-bit signed integers storing seconds since epoch overflow on Jan 19, 2038 at 03:14:07 UTC, wrapping to negative values interpreted as 1901. Modern 64-bit systems handle dates billions of years into the future. The problem primarily affects embedded systems, legacy databases, and some file systems.

The Timestamp Converter lets you convert between timestamps and dates manually. This Reference page shows a live dashboard of the current time in every relevant format with additional info like day of year and week number.