Paste a timestamp or a date and see every common representation.
Enter a Unix timestamp, a date and time, or the word now, one per line. Numbers with 11 or more digits are treated as milliseconds, shorter ones as seconds, which matches how most systems produce them. The result shows seconds, milliseconds, the UTC string, ISO 8601, your local time and a relative description such as 3 days ago.
Typed dates without a time zone can be read as your local time or as UTC, so you can resolve the ambiguity that usually causes off by hours bugs.
The number of seconds since 1 January 1970 at 00:00 UTC, not counting leap seconds.
Current dates have 10 digits in seconds and 13 in milliseconds. The tool uses that rule to guess.
Systems that store seconds in a signed 32 bit integer overflow in January 2038. Modern 64 bit systems are not affected.