Time Zone Converter & Meeting Planner — Across Cities
Schedule meetings and events across the world with ease. UtilHub's Timezone Converter lets you compare times between cities instantly. No more confusion about EST vs EDT or GMT vs BST.
The abbreviations are the trap. EST and EDT are different offsets and the same place at different times of year, so a meeting agreed in 'EST' in July is an hour out. Conversions here use IANA zone identifiers such as America/New_York rather than abbreviations, which means the correct offset for that date is applied automatically, including for the zones that change on different weekends from yours. Half-hour and 45-minute offsets — India, Nepal, parts of Australia — are handled the same way.
How to use Timezone Converter
- Set the base city — Your own zone is picked up automatically; any city on the list can be made the base with one click.
- Pick the date and time — Type them, press Now, or drag the slider through the day and watch every city update.
- Add the other cities — Search by city name (Mumbai, São Paulo) or by zone (Europe/Berlin); up to twelve at once.
- Read the planner — Green hours are 9–17 on a weekday everywhere; the line under the grid names the hours that suit everyone.
- Share it — Copy the times as text for an invitation, or copy a link that opens the same cities, date and time.
Features
- Search by city — Over a hundred city names plus every IANA zone your browser knows.
- Slider and planner grid — Drag through the day or click an hour; each city's working hours are shaded.
- Date-correct DST — Offsets are worked out for the chosen date, with a warning when a city changes its clocks within 60 days.
- Shareable link — The link carries the date, time and cities, so the other side sees exactly what you see.
Frequently Asked Questions
How do you calculate time across different timezones?
Our converter uses the official IANA Time Zone Database (the global standard used by Windows, macOS, and iOS). You select your base timezone and enter a time, then add up to twelve cities. The tool calculates the exact time difference, displaying the local time for each selected city while automatically accounting for global offset rules.
What is the difference between GMT and UTC?
GMT (Greenwich Mean Time) and UTC (Coordinated Universal Time) refer to the same time zone (zero offset), but they differ technically. GMT is a time zone based on solar observations, while UTC is a precise time standard maintained by atomic clocks. In practice, they are interchangeable for most purposes. UTC is the modern standard used in computing and aviation.
How do I handle Daylight Saving Time (DST) conversions?
The converter accounts for DST automatically, and for the date you pick rather than for today: a meeting in July is converted with summer offsets even if you plan it in January. Each city also warns you when its clocks change within the next 60 days. Note that DST dates vary by country — the US changes in March/November, while the EU changes in March/October. Some regions like Arizona and most of Asia don't observe DST at all.
Why should I say America/New_York instead of EST?
Because EST is a fixed offset that New York only uses for part of the year; in summer the city is on EDT, an hour ahead. Naming the zone rather than the abbreviation lets the correct offset be applied for the specific date, which is why calendar software and databases use IANA identifiers rather than abbreviations.
Why is a meeting suddenly an hour out in spring or autumn?
Because the two countries changed clocks on different weekends. Europe and the United States shift daylight saving several weeks apart, so for a couple of weeks each year the usual gap between London and New York is an hour different from normal. Converting for the actual meeting date rather than for today avoids it.