Free time zone tool

What time is it there when it's this time here?

This calculator shows what time it is in one place when it is a chosen local time in another. Pick the date and time where you are, your time zone, and the other place, and you get the matching local date and time there, including any change of day. It uses the IANA time zone database, so daylight saving changes on either side are applied automatically. If a local time does not exist or happens twice on a clock-change day, the calculator says so and asks which one you mean. Use it to plan calls with family, deadlines set in US time, and arrivals. The result is free and stays in your browser.

Complete result is free. Runs in your browser. Reviewed September 2026.

When and where?

Daylight saving is applied on both sides automatically.

Example result

This example is worked out with the values shown. The interactive page recalculates as you type and adds print and export options.

Example inputs
Local date and time09/17/2026, 7:00 PM
Your time zoneTel Aviv / Jerusalem
Compare withNew York

In New York. Thursday, September 17, 2026 at 12:00 PM EDT. 7 hours behind Tel Aviv / Jerusalem on this date.

The selected local time converts to Thursday, September 17, 2026 at 12:00:00 PM EDT.

Assumptions

  • Uses the current browser or server IANA time-zone data. Data versions can differ.
  • The two places may change clocks on different dates. Recheck recurring calls.
  • A missing local time is rejected. A repeated local time requires an earlier or later choice.

How the result is worked out

The entered local time is resolved in your zone using IANA rules. If it maps to no instant, the page reports that the time does not exist that day. If it maps to two instants, the page shows both and asks you to choose. The chosen instant is then formatted in the other zone with en-US full date and long time, including the zone abbreviation.

A realistic example

You are in Tel Aviv and want to call family in New York at 7:00 PM your time on September 17, 2026. The calculator shows Thursday, September 17, 2026 at 12:00 PM EDT. In November, after both places leave summer time on different dates, the same 7:00 PM would be 12:00 PM EST, and for one week in between the gap is six hours.

What this calculator cannot decide

One moment and two places at a time. Depends on the device's time zone data. It does not find shared calling windows or schedule anything; the calling-window finder is a separate planned tool.

The calculator does not decide eligibility, legal obligations, document sufficiency, or official outcomes. Do not enter passport numbers, identity numbers, passwords, or original files.

Sources and review

Time zone rules come from the IANA Time Zone Database built into your browser.

Time Zone Database

IANA. Original source for time zone offsets and daylight saving rules. Your browser supplies its own copy, and versions can differ near a rule change.

Language. English. Retrieved September 16, 2026.

US Expat Desk is the trading name of Joao Vitor Humenhuk Achutti, a sole trader.

Reviewed September 2026. Next scheduled content review. December 2026.

Common questions

What does “this time does not exist” mean?

When clocks spring forward, one hour is skipped. If you enter a local time inside that hour, there is no such moment in that place, and the calculator asks for a different time.

What if a time happens twice?

When clocks fall back, one hour repeats. The calculator shows both possibilities and asks whether you mean the earlier or the later one.

Which time zone data does it use?

The IANA time zone database built into your browser. Versions can differ slightly between devices near a rule change.

Can I plan a recurring call?

Use it for one moment at a time. The two places may change clocks on different dates, so recheck a weekly call around March, April, October, and November.

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