Utility
Time Converter
Time zone conversion
Result
Unix timestamp → date
Around 10 digits is read as seconds; around 13 digits as milliseconds.
Result
Date → Unix timestamp
Result
How to use
Set the source time
Pick a date and time, then choose the time zone it belongs to. Major cities like Seoul are at the top of the list.
Pick the target time zone
Choose the city you want the result in and the converted time appears instantly — including a note whenever the date shifts by a day.
Convert timestamps too
The sections below turn Unix timestamps into dates and dates into timestamps. Press Use current time to fill in the timestamp for right now.
Frequently asked questions
Is daylight saving time (DST) applied?
Yes. The converter uses the IANA time zone database built into your browser, so regions with DST like New York and London automatically get the correct offset for the selected date.
What is a Unix timestamp?
It's the number of seconds elapsed since 00:00:00 UTC on January 1, 1970. It's the standard way to record time in server logs, databases, and API responses.
How are seconds and milliseconds distinguished?
By the size of the number: values of one trillion (10¹²) or more are read as milliseconds, and smaller values as seconds. Present-day timestamps are about 10 digits in seconds and 13 digits in milliseconds.
Which time zones can I choose from?
Any of the 400+ IANA time zones your browser provides. Major zones like Seoul, UTC, New York, and London are pinned to the top of the list.
Is the time I enter sent to a server?
No. Both time zone conversion and timestamp conversion run in your browser, and nothing you enter is sent anywhere.