Your time zone

Time

Date

Target time zone

Converted time —

Time difference —

Target UTC offset —

How to use the time zone converter

What is this tool for?

This converter tells you what time it is (or will be) somewhere else in the world, based on a time in your own time zone. It comes in handy to schedule a video call with colleagues abroad, call family overseas at a reasonable hour, watch a live sports event, or check the local arrival time of a flight. It automatically handles daylight saving time in each country, as well as conversions that land on the previous or next day.

Step by step

Your time zone: detected automatically from your device settings. You can pick another one from the list, grouped by region (North America, Central & South America, Europe, Asia & Middle East, Africa, Oceania, UTC).

Time and date: the current time is filled in by default. Change them to convert any other moment. The date matters, because the time difference can change with the seasons.

Target time zone: choose the destination city or country.

Read the result: the converted time, the full date at the destination, a "Previous day" or "Next day" label if the date changes, the time difference between the two zones, and the destination's UTC offset.

The "⇅ Swap" button exchanges the two time zones to convert in the other direction.

Formula and rules

Every time zone is defined by its offset from Coordinated Universal Time (UTC). The conversion takes two steps:

UTC time = time entered − offset of the starting time zone

Converted time = UTC time + offset of the target time zone

Offsets are calculated for the date you select, using the official time zone database (IANA) built into your browser. It includes every country's daylight saving time rules, as well as the countries that don't observe it. Non-whole-hour offsets are handled correctly too, such as India's UTC+5:30 or Nepal's UTC+5:45.

Example: 3:00 PM in New York on January 15 (UTC−5) is 20:00 UTC, which is 8:00 PM in London (UTC+0), a difference of +5 hours, and 5:00 AM the next day in Tokyo (UTC+9).

Frequently asked questions

Why is London sometimes 4 hours ahead of New York instead of 5?

The United States and Canada switch to daylight saving time on the second Sunday in March and back on the first Sunday in November, while the United Kingdom and the European Union switch on the last Sunday in March and the last Sunday in October. For a few weeks each spring and fall, the gap between New York and London is therefore 4 hours instead of 5. Enter the exact date to get the right difference.

How many time zones does the United States have?

The contiguous United States has four main time zones: Eastern, Central, Mountain and Pacific. Alaska and Hawaii have their own, plus several more in US territories. Most of Arizona and all of Hawaii don't observe daylight saving time, which is why Phoenix is listed separately from Denver.

Is the offset shown in the list always valid?

The offset in parentheses in the list is today's offset. The conversion itself uses the offset actually in effect on the date you entered.

What happens on the night the clocks change?

On the day daylight saving time starts, one hour doesn't exist (for example 2:30 AM in New York on the second Sunday in March): the tool moves it forward to the next valid time. On the day it ends, one hour occurs twice: the tool uses one of the two.

My city isn't in the list. What should I do?

Pick a major city in the same country and region: it is usually in the same time zone. For large countries (United States, Canada, Australia, Russia, Brazil), double-check which time zone applies to your location.

What's the difference between UTC and GMT?

Coordinated Universal Time is the worldwide reference time standard and never changes for daylight saving. GMT (Greenwich Mean Time) is often used as a synonym for UTC+0, and is the time in force in the United Kingdom in winter. In summer, the UK switches to BST (British Summer Time), which is UTC+1.

Time Zone Converter