What is Time Zone Converter?

The Time Zone Converter converts a time from one zone to another so you can schedule meetings across continents. It supports all major time zones and handles daylight saving transitions automatically.

Sixteen popular zones are preloaded — EST, GMT, CET, IST, JST, KST, AEST, BRT, GST, SGT and more — and a city search lets you add any of the 400+ zones your device knows just by typing a name. The math uses your device's built-in Intl time-zone engine, which handles daylight saving transitions on the correct dates per region, and zones currently on summer time get a DST badge. A visual world map highlights your source and target zones so you can see the time difference at a glance. Each converted zone shows its signed gap from the source and a one-tap copy button. A meeting planner grid colour-codes every hour as working, fringe or night across all your zones, suggests the best slots where everyone is awake, and exports the chosen time straight to Google Calendar, Outlook or a .ics file.

How to use

1. Select your source time zone and enter the time you want to convert.
2. Pick target zones from the dropdown, or type a city name in the search box to add any zone in the world.
3. See the converted times side by side — add more zones as needed.

When to use

• Scheduling a remote meeting across three or more continents without doing mental math.
• Working out what time your overseas family or friends are actually awake right now.
• Setting a launch time that works for users in Europe, the US east coast, and Asia.

Result

You schedule a call at 3 PM EST and need to know the time in Tokyo (JST) and London (GMT): the converter shows 5 AM JST (next day) and 8 PM GMT.

FAQ

Does the converter handle daylight saving time automatically?

Yes. It uses the Intl.DateTimeFormat time-zone engine built into your device, with full timezone awareness that knows when each region switches in and out of DST. A meeting at 9 AM New York in January and 9 AM New York in July will show different UTC offsets correctly.

Why are some times labelled with tomorrow's or yesterday's date?

Because the date crosses midnight in the target zone. 11 PM in Los Angeles is 7 AM the next day in London — the converter shows the correct weekday next to the time so you don't book a meeting on the wrong calendar day.

Can I add a zone that's not in the popular list?

Yes — type any city name or abbreviation into the search box (for example 'Cairo', 'Auckland', or 'IST') and pick from the matches. The search covers every IANA zone your device knows, well over 400, so you're never limited to the popular shortcuts.

What's the difference between EST and EDT?

EST is the standard offset (UTC−5) used during winter on the US east coast. EDT is the same zone in summer (UTC−4) after the spring DST shift. The converter labels the zone simply as 'EST' but applies the correct offset based on the date you're converting.

Why does the source zone default to my local time?

The tool reads your timezone from your device's own time settings via Intl.DateTimeFormat().resolvedOptions().timeZone on first load, since that's almost always what you want as a starting point. Switch it to any other source zone if you're planning from someone else's perspective.

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