Timezone Converter

Convert a time in one city to the local time in another.

Pick a time and two cities to instantly see the corresponding local time.

Timezone Converter brings a small but genuinely useful tool together on a single page. Timezone Converter quickly handles a conversion or task that comes up often in everyday use. Everything runs in your browser — your file or text is never uploaded to a server.

Step-by-step

Enter the time you want to convert in the 'Time' field, for example a meeting start time on your side.
Choose where that time applies from the 'From City' list.
Choose the other person's city from 'To City'. If their city isn't listed, pick another city in the same time zone, or UTC.
Click 'Run' to see the matching local time. Swap the two cities and run again to check the other direction.

Example

You're in London setting up a call with a colleague in Tokyo, and 9 am suits you. Japan stays on UTC+9 all year with no daylight saving. London is on UTC+0 in winter and UTC+1 in summer. So 9 am in London is 6 pm in Tokyo in winter and 5 pm in summer. That one-hour swing is exactly the kind of thing that quietly breaks a recurring meeting.

Istanbul is a simple case worth knowing: Türkiye has stayed on UTC+3 year round since 2016 and no longer changes its clocks.

When converting time zones

The world is divided into time zones and each carries an offset from UTC; Turkey is at UTC+3 and does not observe daylight saving. Many countries do observe daylight saving and its dates differ from country to country, so the gap between two cities may not stay constant all year. When planning meetings, writing the time zone alongside date and time prevents confusion.

Tips when planning meetings

In meeting invitations write both your time and the other side's time.
In countries that switch to daylight saving in March and October-November the gap can change; convert with the full date.
Near midnight the date can change too; check the date.
In international teams, using UTC as a common reference helps.

Things to keep in mind

There's no date field. If the meeting is weeks away, check whether a daylight saving change falls in between in either location.
Europe and the US don't switch to or from daylight saving in the same week. For a short stretch in March and again in October or November, the usual gap between, say, London and New York shrinks by an hour.
Times near midnight can land on the previous or next day. When you send an invite, write the date as it falls for the other person.
Putting the time zone in the calendar invite itself avoids the confusion of a bare '10 o'clock'.