Time zone converter and meeting planner

How to convert a time between zones

Every city has an offset from UTC (Coordinated Universal Time). To convert, subtract the starting city's offset to get UTC, then add the destination's offset.

\[ \text{destination time} = \text{start time} - \text{start offset} + \text{destination offset} \]

Example: noon in New York in winter (UTC−5) is 17:00 UTC, which is 02:00 the next day in Tokyo (UTC+9). When the result crosses midnight the date changes, and the tool flags it with "+1 day" or "-1 day".

Daylight saving changes the gaps

The U.S. springs forward on the second Sunday of March and falls back on the first Sunday of November. Europe changes on the last Sunday of March and the last Sunday of October. For a few weeks the gap between New York and London shrinks from 5 hours to 4.

Japan, India, China and most of the Middle East do not change clocks, so their gap with the U.S. shifts by an hour twice a year.

U.S. time zones at a glance

Time zone converter: schedule an international meeting

To set a meeting with colleagues abroad, a time zone converter prevents mistakes. First, pick your city and the time you want. Then add your guests' cities. Next, spot the hours that work for everyone. Finally, send the invite with the zone spelled out.

For example, 3 PM in New York is 12 noon in Los Angeles and 8 PM in London in winter. So the London guest works late. In contrast, 10 AM in New York is 7 AM in Los Angeles, which is early. In fact, overlap between the U.S. East Coast and Europe is narrow, and the West Coast overlap is narrower.

Time zone converter: daylight saving traps

Daylight saving time complicates everything, because countries do not switch on the same day. When you check a gap, always look at the date. In 2026, Europe returns to standard time on October 25, while the U.S. does so on November 1. Between those dates, New York and Paris are only 5 hours apart.

However, some places, such as Arizona, never change their clocks.

Time zone converter: related tools

To go further, combine several tools. For example, use the countdown timer to follow an event abroad. Then work out the time between two clock times with the hours calculator. Finally, for a long trip, count travel days with the days between dates calculator.

So you can plan a trip with no surprises. Also, write the local time and your own time in your messages.

Finally, keep a short list of the cities you call most. Add your family, your team and your client. Then check that list before every call, and the evening you plan will rarely clash with someone's sleep. A small habit like this prevents most scheduling mix-ups, even across several countries and many clock changes.

Also, write down meeting links, phone numbers and agendas in one note. Share it ahead of each call, and everyone arrives prepared. That extra step takes a minute and saves a long thread of messages afterward, especially when many people join from far apart.