Time Zone Converter

Converters

Convert a time between 20 major world time zones, DST included.

Nothing Is UploadedRuns In This Browser TabNo Account Needed

How It Works

1

Upload / Input

Select your files or paste your content to get started.

2

Process

The work happens in this browser tab. Your file never leaves your device, so nothing is queued, stored or transmitted.

3

Download / Result

Get your results instantly. Download files or copy output in one click.

Features

20 major world time zones, from UTC to Auckland
Automatic daylight saving detection for the date you enter
Live clock and UTC offset shown for both zones
Swap source and target with one click
One button to start from the current time

How to use Time Zone Converter

  1. Set the source time and zone

    Enter the time and where it applies.

  2. Pick the target zone

    Choose the place that needs to see the time. It is one target at a time — change it and read again for each further location.

  3. Check the date

    Large offsets push the time into the previous or next day — that is the classic error.

  4. Confirm before sending

    State the time zone explicitly in any invitation.

When to use Time Zone Converter

  • Scheduling a call across several countries
  • Working out when a deadline in another time zone actually falls
  • Checking what time a live event starts locally
  • Coordinating with colleagues in a distributed team

FAQ

Yes. The converter uses the IANA time zone database, so DST transitions are applied automatically for any date.
Not at once — the converter handles one source and one target. Change the target to check another zone; the date and time you entered stay put, so working down a list of participants takes a click each.
Twenty of the most commonly scheduled ones: UTC, the four US zones, London, Paris, Berlin, Moscow, Dubai, India, Singapore, Hong Kong, Tokyo, Sydney, Auckland, Sao Paulo, Mexico City, Cairo and Johannesburg. Each is a real IANA zone, so its daylight saving rules are the authoritative ones.
Large offsets cross midnight. A 9 pm call in New York lands at 10 am the following day in Tokyo. Always read the date alongside the converted time.
It changes the offset between two places, and countries switch on different dates. The usual gap between the UK and US shifts by an hour for a few weeks each spring and autumn, which is when scheduling errors cluster.
Use UTC as the reference, since it never shifts, and always state the time zone explicitly in the invitation. Calendar software that stores the zone rather than the local time handles transitions correctly.
Pick the zone your city actually observes rather than the nearest city name — Dublin and Lisbon keep London time, Amsterdam and Madrid keep Paris time, and most of India is on the single Kolkata zone. The list covers twenty zones, and between them they cover the large majority of places people schedule across.
No. Much of Asia, Africa and South America does not, and some countries have abolished it recently. Never assume a location shifts.

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About Time Zone Converter

Time zone conversion is simple arithmetic that goes wrong constantly, and almost always for the same two reasons: the date changes, and daylight saving shifts the offset.

The date problem is easy to miss because people check the hour and not the day. A 9 am meeting in New York is 10 pm the same day in Tokyo — but a 9 pm meeting in New York is 10 am the *next* day. Always confirm the date alongside the time.

Daylight saving is worse, because the offset between two places is not constant through the year. The UK and the US both observe it but change on different dates, so for a few weeks each spring and autumn the usual five-hour gap becomes four or six. Australia is in the opposite hemisphere and shifts the other way. Never compute an offset once and reuse it across a date boundary.

Tips and limits

  • Always state the time zone explicitly. "3 pm" alone causes more missed meetings than anything else.
  • Check the date, not just the hour — large offsets cross midnight.
  • Offsets change with daylight saving, on different dates in different countries.
  • UTC does not observe daylight saving, which makes it the safest reference for scheduling.
  • For a recurring meeting, verify it again after each daylight saving transition.