Convert times between cities, view a live world clock and plan cross-zone meetings.
Frequently asked questions
Does this converter handle Daylight Saving Time?
Yes. Conversions rely on the browser's built-in IANA time-zone database (Intl.DateTimeFormat), which is updated by operating-system vendors. A date in March or November is interpreted in the correct DST state for the city, so a meeting at 10:00 New York time maps to the right UK hour even when the two countries shift on different weekends.
What is the difference between UTC and GMT?
UTC (Coordinated Universal Time) is the atomic-clock-based standard used by computer systems and aviation. GMT (Greenwich Mean Time) is a civil time zone used in parts of the UK and West Africa. For everyday purposes the two are identical, but GMT can observe British Summer Time in the UK, while UTC never shifts.
Why does the date sometimes jump by a day?
When the time difference between two cities is large enough to cross midnight, the calendar date rolls forward or backward. For example, 22:00 Monday in New York is 11:00 Tuesday in Tokyo. The converter shows a "+1 day" or "-1 day" badge so you never book a meeting on the wrong calendar day.
How do I pick a meeting time that works for everyone?
Open the Meeting Planner tab, enter any starting time in your own zone and add up to three participant zones. The 24-hour bars highlight each person's local work hours (08:00-18:00) in green. Look for a column where every row is green — that is the overlap window where the call falls inside everyone's working day.
Why do India and Nepal have half-hour or 45-minute offsets?
Most zones differ from UTC by whole hours, but some countries use fractional offsets for historical or political reasons. India Standard Time is UTC+05:30, Nepal is UTC+05:45, Iran is UTC+03:30, parts of Australia are UTC+09:30, and the Chatham Islands in New Zealand use UTC+12:45. The converter handles these correctly.
What is the International Date Line?
The International Date Line is an imaginary line roughly along the 180th meridian in the Pacific. Crossing it westward adds a calendar day; crossing it eastward subtracts one. This is why Samoa (UTC+13) and American Samoa (UTC-11) can share almost the same clock time but be a full day apart on the calendar.
This time zone converter translates any date and time from one city to another using the browser IANA database, so results stay correct across Daylight Saving Time shifts. Pick a source date and time, choose a source zone such as New York and a destination zone such as Tokyo, and the tool returns the exact local clock time with a badge if the calendar day rolls forward or back.
The World Clock tab shows current time in 18 major cities at once and refreshes every second. The Meeting Planner tab takes one starting time and up to three participant zones, then draws 24-hour bars that highlight each person local work hours (08:00-18:00) so the overlap window is easy to spot. The Difference tab reports the current hour gap between any two zones in plain language.
Example: 22:00 Monday in New York becomes 11:00 Tuesday in Tokyo, a 13-hour gap. 09:00 London in winter equals 04:00 New York, but 09:00 London in summer equals 04:00 New York as well because both regions observe DST.