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Time Zone Converter

Convert a date and time between time zones around the world, with daylight saving time, UTC offsets and day changes shown for each zone.

Runs locally, never uploaded

Options

Date and time

Converted times

Result appears here

What it does

This time zone converter shows what a date and time in one zone is in other zones around the world. It is handy for scheduling meetings across offices, reading log times from servers in another region, or checking when a release or event starts for your users.

Every row shows the local date and time, the UTC offset, how far ahead or behind it is compared with the input, and whether it falls on the next or previous day. The ISO 8601 UTC time and the Unix timestamp are listed too, ready to copy.

How to use

  1. Type a date and time, or click Now for the current time. Click Sample to load an example.
  2. Choose the Input time zone. By default it is your own zone as detected by the browser.
  3. Add zones with Convert to, and remove one by clicking its name below the options.
  4. Turn on 12-hour clock if you prefer am/pm. Copy any row with its copy button.

Example

Each of these inputs is accepted:

2025-03-14 15:30
2025/3/14 3:30 pm
9:00 am
2025-03-14T19:30:00Z
2025-03-14 15:30 +05:30
1741980600
now

With New York as the input zone, 2025-03-14 15:30 is 19:30 in UTC, 12:30 in Los Angeles and 04:30 the next day in Tokyo, because New York is already on daylight saving time (UTC−04:00) while Japan never changes its clocks.

Tips for working across time zones

Store and exchange times in UTC or with an explicit offset, and convert to local time only for display. When you schedule a recurring meeting, check a date after the next DST change too: Europe and North America switch on different weekends, so the gap between them shifts by an hour for a few weeks each spring and autumn.

FAQ

› How does the converter handle daylight saving time?

It uses the time zone database built into your browser, so every zone gets the offset that applies on the date you enter, including past and future DST changes. If a local time is skipped when clocks go forward, it is moved past the gap; if it happens twice when clocks go back, the first occurrence is used, and a note says so.

› Which input formats are accepted?

A date and time such as 2025-03-14 15:30 (seconds and am/pm are optional), a time alone such as 9:00 am for today, a Unix timestamp in seconds or milliseconds, an ISO 8601 time with Z or an offset, or the word now. Times with an offset or a timestamp are absolute, so the input time zone is ignored for them.

› Why are zones named after cities instead of EST or CET?

Abbreviations are ambiguous (CST is used in the US, China and Cuba) and do not say when daylight saving time applies. IANA zone names like America/Chicago or Europe/Paris pin down both the offset and its DST rules, which is what computers and calendars use.

› Are my settings saved?

The time zones you add and the 12-hour setting are kept in the page address and in your browser, so a bookmark or shared link opens the same list. Nothing is sent to a server.