Time Zone Converter – Convert Time Between Cities and Countries

How to use the time zone converter

1. Choose the date and time you want to convert. They start at your current date and time.
2. Choose the From time zone — it starts on your own zone when we can detect it.
3. Choose the To time zone.

You’ll see the converted time and day, the UTC offset of each zone, the difference in hours, the time in UTC, and a world-clock table with the same moment in cities such as Los Angeles, New York, London, Paris, Lagos, Nairobi, Johannesburg, Dubai, India, Singapore, Tokyo and Sydney.

How time zone conversion works

Every time zone is an offset from Coordinated Universal Time (UTC). To convert, the time is first turned into UTC, then the target zone’s offset is applied:

The hard part is that offsets change during the year in places with daylight saving time, and on different dates in different countries. The US moves its clocks on the second Sunday in March and the first Sunday in November; the UK and the EU move theirs on the last Sundays of March and October. For a few weeks each year, the gap between New York and London is therefore four hours instead of five. The converter looks up the offset for the exact date you choose, so you don’t have to remember these rules.

Worked example

A call is set for 9:00 am in London on 8 November 2026:

• London is on GMT (UTC+0), so it is 09:00 UTC
• New York (UTC−5): 4:00 am
• Lagos (UTC+1): 10:00 am
• Nairobi (UTC+3): 12:00 noon
• India (UTC+5:30): 2:30 pm
• Sydney (UTC+11, summer time): 8:00 pm

Tips for scheduling across time zones

• Always state the time zone when you send a meeting time — “3 pm ET” or “15:00 UTC”, not just “3 pm”.
• Watch the date line. A late-evening meeting in the US is often the next morning in Asia and Australia.
• Check daylight-saving weeks in March, April, October and November, when gaps change.
• Use UTC for logs and servers, and convert to local time only for display.
• Find overlap hours. Between New York and Nairobi, late morning in New York is late afternoon in Nairobi — often the only shared working hours.

Common time zone abbreviations

Abbreviations can be ambiguous — IST also means Irish and Israel Standard Time — so city names are safer.

For durations between dates, use the date difference calculator; to convert a server timestamp, the Unix timestamp converter. The conversion runs in your browser with no data sent anywhere.