See the live time in cities you choose, the difference from your own zone and the hours when working days overlap.
The world clock shows the current time in every city you add, with your own time zone first and each city's difference from you beside it. At 12:00 UTC on 15 October 2026 it reads 08:00 in New York, 13:00 in London, 17:30 in Kolkata, 21:00 in Tokyo and 23:00 in Sydney. From Kolkata, New York is 9 h 30 min behind you and Tokyo is 3 h 30 min ahead. The page opens with those five cities and lets you add up to 12 in total by typing a city name. The list is saved in this browser, so it is there next time. The times update by themselves, and you can turn on seconds. The offsets shown, such as UTC+5:30, are read for the exact moment on screen.
Each offset comes from your browser's time zone database for the instant shown, so daylight saving is applied on the right date for each place. New York is UTC-5 in winter and UTC-4 from 8 March 2026, when its clocks jump from 02:00 to 03:00. Sydney is UTC+11 in January, drops to UTC+10 when daylight saving ends on 5 April 2026, and returns to UTC+11 on 4 October 2026. Not every zone moves by whole hours: Kolkata is UTC+5:30 all year and Kathmandu is UTC+5:45. The difference line writes these out in hours and minutes, and a chip says Tomorrow or Yesterday when a city is on a different calendar date from yours. The data is the IANA time zone database; zones are named after a city, so type the main city of a region.
Set your workday, 09:00 to 17:00 by default, and the page checks the next 24 hours in half-hour steps. A half hour counts only if every city on your list, and you, are inside the workday at that moment. London and New York in January overlap from 14:00 to 17:00 London time. The bar under each city shows the same 24 hours, starting now in your time: green is inside the workday, yellow is up to two hours before or after, and grey is night. If the text says there is no overlap, widen the workday or drop a city. The bars use colour, so each row also states Working hours, Early or late, or Night in words. The result is a guide; public holidays and weekends are not checked.
It shows the time now, not a time in the past or future. To turn a given date and time, such as 9:00 on 8 October, from one zone into others, use the time zone converter, which also explains skipped and repeated hours. The page does not look up sunrise, holidays or business hours, and it trusts your device's clock: if your computer's time is wrong, every city is wrong by the same amount. A very new zone name may be missing on an old browser. Abbreviations such as IST or CST are not accepted, because each one can mean several zones.
Type a city name in Add a city and press Add. The page keeps up to 12 cities and updates every few seconds. The first row is your own zone, so each other row can show how many hours it is ahead of or behind you.
Yes. Each city's offset is read for the current instant, so New York is UTC-4 from 8 March 2026 and Sydney is UTC+11 from 4 October 2026. Places with half-hour offsets such as Kolkata at UTC+5:30 are shown as they are.
Set your workday hours, then read the overlap line. For London and New York at 09:00 to 17:00 it reports 14:00 to 17:00 London time. The line covers the next 24 hours, counted from now, and needs every city to be inside the workday.
The world clock shows what time it is now in many cities. The time zone converter takes one date and time you choose, such as 9:00 on 8 October in Sydney, and shows the same moment elsewhere, with notes for skipped hours.
Zones are named after one city per region, so try the main city nearby, for example Kolkata for India. The search also matches parts of names such as york. Abbreviations like IST are not accepted because they can mean different zones.
The time is worked out in your browser and nothing is uploaded. Your city list, workday hours and 12 or 24 hour choice are saved in this browser's local storage so they are there on your next visit. Reset clears them. The page only counts that a result was shown, without your cities.