Timezone Converter

Type a city or timezone name into the "From" field and select your source zone, enter the time you want to convert, then choose one or more destination timezones. The result updates instantly. Click "Now" to use the current time in your source zone.

New York (ET) is normally 5 hours behind London (GMT/BST) in winter and 4 hours behind in summer — because the US and UK change their clocks on different dates, creating a brief period each spring and autumn where the gap is 4 or 6 hours rather than the usual 5.

UTC (Coordinated Universal Time) is the global reference point from which all timezones are defined. It is essentially the same as GMT. New York runs UTC−5 in winter (EST) and UTC−4 in summer (EDT). London is UTC+0 in winter and UTC+1 in summer. Tokyo is always UTC+9 — Japan does not observe Daylight Saving Time.

The overlap window between US East Coast business hours (9 AM–6 PM ET) and Western Europe (9 AM–6 PM CET) is typically 3 PM–6 PM ET / 9 PM–midnight CET — a tight window. The best practical meeting time is around 3–4 PM ET / 9–10 PM CET, or earlier if European participants are willing. Use the converter above to check your specific cities.

Most of Asia, Africa, and equatorial regions do not observe DST. Notable countries without DST include Japan, China, India, most of the Middle East, and most of sub-Saharan Africa. In the western world, Iceland, Arizona (US), and Queensland (Australia) are among the notable non-observers. Russia abolished DST in 2014.

Some of the world's most unusual timezones include Nepal (UTC+5:45 — the only 45-minute offset with a large population), India (UTC+5:30 — a single half-hour offset for 1.4 billion people), and Lord Howe Island in Australia (the world's only 30-minute Daylight Saving Time shift). Explore our Deep Dives for the full stories.