World Clock

How to use the world clock

The page shows the current time in 20 of the most-searched cities around the world, ordered from west to east. The first card, Your time, uses the time zone your device is set to, so every other city can be compared with it.

• View: switch between Analog clock faces and Digital readouts. Your choice is remembered in this browser.
• Time format: in the digital view, choose a 12-hour clock with AM and PM or a 24-hour clock.
• Find a city: type part of a city or country name, for example tokyo or germany, to narrow the list. Accents are ignored, so sao finds São Paulo.

Every card also shows the local date, the city's offset from Coordinated Universal Time (UTC) and the difference from your own time, such as +8 h or −3 h 30 min. When a city is already in tomorrow or still in yesterday compared with you, the date says so. Analog faces turn dark between 6 PM and 6 AM local time, so you can tell at a glance where it is night.

How the times are calculated

The clocks use the time zone rules built into your browser, which follow the IANA time zone database used by operating systems worldwide. Nothing is downloaded from a time service and nothing about you is sent anywhere. The time comes from your device clock, so if your computer or phone is set to the wrong time, every clock on the page will be off by the same amount.

Daylight saving time is applied automatically. New York, for example, is at UTC−5 in winter and UTC−4 in summer, while Sydney does the opposite because its summer falls in the northern winter. Cities without daylight saving, such as Tokyo, Dubai, Mumbai and Singapore, keep the same offset all year.

Worked example

Suppose a video call starts at 9:00 AM in New York on a January morning. New York is then on UTC−5, so the call starts at 14:00 UTC. At that moment it is:

• 14:00 in London (UTC)
• 19:30 in Mumbai (UTC+5:30)
• 23:00 in Tokyo (UTC+9)
• 01:00 the next day in Sydney (UTC+11, summer time)
• 03:00 the next day in Auckland (UTC+13, summer time)

Good to know

• Some places use offsets that are not whole hours. India is 5 hours 30 minutes ahead of UTC, and the clock shows that as UTC+5:30.
• Daylight saving does not start on the same day everywhere. The United States changes clocks in March and November, the European Union on the last Sundays of March and October, so for a few weeks a year the gap between New York and London is one hour shorter than usual.
• Beijing time is used across the whole of mainland China, and Moscow time across much of western Russia.
• To work out a time span between two moments, use the Time Duration Calculator; to add hours to a date and time, use the Time Calculator.