World Clock
Live times across cities, with a meeting planner and DST handled properly.
Your local time
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Cities
Meeting planner
Hours shaded green are 09:00–18:00 locally.
Why a real timezone database matters
A fixed table of UTC offsets is the obvious shortcut, and it is wrong for roughly half the year. London is UTC+0 in January and UTC+1 in July. The United States, the European Union and the southern hemisphere all switch on different dates, and a handful of zones use offsets that are not whole hours — India is UTC+05:30, Nepal UTC+05:45.
Every time here is computed with Intl.DateTimeFormat, which is backed by the IANA timezone
database your browser already ships. That means correct daylight saving, correct historical transitions and
zero extra download.
Reading the cards
Each city shows its current time, its date, its offset at this instant, and the zone abbreviation. When a city's calendar date differs from yours, it is labelled tomorrow or yesterday — the thing that catches people out when scheduling with Auckland or Honolulu.
The meeting planner
The grid shows the next twelve hours across every city you have added. Cells shaded green fall between 09:00 and 18:00 locally, so a column green in every row is a slot that works for everyone. Pick the base city to line the columns up with whoever is proposing the time.
Your city list is stored in your browser only — nothing is sent anywhere, and clearing site data removes it.