World Clock — Current Time Around the World

Why 24 cities and not the usual 6

Most world clocks top out at the usual suspects — New York, London, Tokyo, Sydney — and call it a day. That covers the business-hours overlap maybe three quarters of the planet cares about. The other quarter lives in Manila or Mumbai or São Paulo and has to do the math twice. So we show every continent, with a bias toward cities people actually schedule meetings into: Dubai for Gulf business, Singapore and Hong Kong for Asian finance, Istanbul as the Europe-Asia bridge, Auckland when you need the earliest Monday on Earth.

If your city isn't in the grid, the time zone converter covers 90+ more, and the meeting planner handles whatever combination you throw at it.

How time zones actually work

In theory, time zones are evenly spaced one-hour slices around the planet, pinned to Coordinated Universal Time (UTC). In practice, borders go where politics send them. Mainland China is one single zone despite spanning a geographic five hours of longitude — Beijing and Kashgar share UTC+8. India runs on UTC+5:30, a half-hour offset. Nepal sits at UTC+5:45, a quarter-hour offset. The International Date Line bends around entire island groups.

For everyone who's ever wondered why their calendar app is the way it is, this is why: the source of truth isn't "add 5 to UTC." It's the IANA time zone database, a continuously maintained list of every political decision that ever moved a clock. Whenest uses it. So does every serious scheduling tool on the internet.

Daylight saving, globally

The grid above marks DST cities with a small tag when they're currently on summer time. If you're reading this between mid-March and early November in the northern hemisphere, roughly a third of the cities shown will have their offset bumped by an hour. The rest — Dubai, Tokyo, Singapore, Mumbai, most of Africa — never shift.

The interesting part is the two weeks in March when the US has already sprung forward and the EU hasn't yet. For those 14 days the usual 5-hour London-to-New-York gap shrinks to 4. Everyone's recurring weekly call moves by an hour, and nobody remembers why. If your team operates on both sides of the Atlantic, the recurring meeting finder is built to warn you about exactly this transition before it eats a calendar week.

When the world is at work

Here's a useful mental model. Pick any hour in New York and ask which other cities on the grid are also in someone's working day. At 9am Eastern, London is already at lunch, Paris and Berlin are wrapping up their morning block, and Dubai is on the way home. Mumbai finishes shortly after, and Tokyo is about to sleep. Los Angeles just woke up. That one hour is the single best synchronous moment for a North America / Europe / Middle East overlap — and the worst for anyone in East Asia.

At 5pm Eastern, the flip happens: Tokyo and Sydney are at breakfast, Mumbai is at lunch, Europe is at dinner, and Los Angeles has four more hours in the workday. That's the second-best window, this time for Asia-Pacific overlap. If you need both on the same call you usually pick between these two hours, accept that someone on the call is outside 9-to-5, and move on.

Dedicated city guides

The cities below have a full page covering how their time zone works locally, DST history, business-hours conventions, and the best windows for coordinating with common counterpart zones. Click any card above to jump straight in, or pick from the list: