Current time in major cities worldwide, updates automatically every minute:
This timezone converter is simple and intuitive. Here is a detailed guide:
Basic Conversion: In the "Source City" section, select your current timezone or the starting timezone you want to convert from, then use the date and time picker to set a specific time. In the "Target City" section, select the timezone you want to convert to. Click the "Convert Time" button, and the tool will automatically calculate and display the corresponding time in the target timezone, along with the time difference between the two locations.
Quick Actions: Click "Set to Current Time" to automatically set the source city time to your current local time. Click the "Swap" button to quickly exchange the source and target timezone settings for bidirectional conversion. Click "Clear" to reset all inputs.
World Clock: The World Clock section at the bottom of the page displays the current time in major cities worldwide, updating automatically every minute. You can quickly check multiple cities without any action.
DST Handling: The tool automatically detects and applies DST rules for the selected cities. When the selected date falls within the DST period, the tool adjusts the time display accordingly. You do not need to manually calculate DST effects.
This timezone converter is useful in many scenarios. Here are some typical use cases:
Scheduling International Meetings: When you need to arrange meetings with overseas teams or clients, the timezone converter helps you quickly find a convenient time for both parties. For example, you can enter 3 PM Beijing time and see the corresponding times in New York, London, and Tokyo to choose the best meeting slot.
Study or Work Abroad: Those preparing to go abroad can use the timezone converter to understand the destination time in advance, helping to adjust their body clock. When keeping in touch with family and friends back home, you can avoid calling or messaging during their sleeping hours.
Cross-Border E-commerce / Foreign Trade: E-commerce sellers and foreign trade professionals often need to communicate with clients from different countries. With the timezone converter, you can understand your client's local working hours and choose appropriate times to send emails or communicate online, improving efficiency.
Travel Planning: When planning international trips, the timezone converter helps you understand the destination time in advance and arrange your itinerary accordingly. Especially for long-haul trips involving multiple time zones, the tool helps you calculate transfer times, hotel check-in times, and more.
Origin of Timezones: The concept of timezones was first proposed by Canadian engineer Sandford Fleming in 1879. He suggested dividing the Earth into 24 time zones, each differing by one hour. This proposal was adopted at the International Meridian Conference in 1884, establishing the global timezone system centered on the Greenwich Observatory at zero degrees longitude.
Difference Between UTC and GMT: UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) represent the same time in most practical situations. UTC is based on atomic clocks and is more precise, serving as the modern international standard. GMT is based on Earth's rotation, and because Earth's rotation is gradually slowing, there is a tiny difference between GMT and UTC (leap seconds).
Daylight Saving Time (DST): DST is a system where clocks are adjusted forward by one hour in spring and back by one hour in autumn to make better use of daylight. When DST begins, clocks are moved forward; when it ends, clocks are moved back. Currently, about 70 countries observe DST, while countries like China and Japan do not.
International Date Line: The International Date Line roughly follows the 180-degree meridian and marks where a new calendar day begins. When crossing from west to east, you subtract one day; when crossing from east to west, you add one day. The timezone converter automatically handles date changes across the date line.
This tool supports over 200 major cities and timezones worldwide, covering Asia, Europe, North America, South America, Oceania, Africa, and the Middle East, including Beijing, Tokyo, New York, London, Paris, Sydney, and more.
No. This tool runs entirely in your browser. All timezone calculations are performed locally on your device, and no data is uploaded to any server. You can use it offline.
Yes. The tool automatically detects and applies DST rules for the selected cities. You do not need to manually adjust for DST; the tool will automatically determine whether the selected date falls within the DST period.
Select the source city and target city, and the tool will automatically display the time difference. A positive number means the target city is ahead, and a negative number means it is behind. The tool also shows the converted local time.
The World Clock feature displays the current time in major cities worldwide, updating automatically every minute. It's perfect for scheduling international meetings, contacting overseas clients, or checking on friends and family abroad.
UTC (Coordinated Universal Time) and GMT (Greenwich Mean Time) represent the same time in most practical situations, but UTC is more precise and based on atomic clocks, while GMT is based on Earth's rotation. UTC is the modern international standard.
Some countries and regions use half-hour timezones (e.g., UTC+5:30, UTC+9:30) because these areas are located midway between two whole-hour time zones. To more accurately reflect local solar time, they choose a 30-minute offset. India, Nepal, and parts of Australia use half-hour timezones.
This tool uses the browser's built-in Intl API for timezone calculations, with reliable data sources that accurately handle complex situations like DST. However, since countries may adjust DST policies temporarily, please verify with official time sources for critical occasions.