World Clock by Time Zone

A world clock is a tool that allows you to view current times in major cities worldwide at a glance. Due to Earth's rotation, different regions have different time zones, and through the world clock, you can check times in real-time for 20 major cities including New York, London, Tokyo, and Paris. It provides analog clocks and digital time displays for each city, along with date information, and automatically calculates time differences from Seoul.

The world is divided into 24 time zones based on UTC (Coordinated Universal Time). Our world clock supports major cities including New York (UTC-5), Los Angeles (UTC-8), London (UTC+0), Paris (UTC+1), Berlin (UTC+1), Tokyo (UTC+9), Hong Kong (UTC+8), Singapore (UTC+8), Sydney (UTC+10), Dubai (UTC+4), Moscow (UTC+3), Beijing (UTC+8), Bangkok (UTC+7), Delhi (UTC+5.5), Jakarta (UTC+7), Cairo (UTC+2), Mexico City (UTC-6), São Paulo (UTC-3), Toronto (UTC-5), and Chicago (UTC-6).

Our world clock automatically updates every second to always show accurate time. Analog clock hands (hour, minute, second) move in real-time, and digital time displays are also provided so you can check time in various ways. Current dates and days of the week are shown for each city, making it easy to identify date differences in regions crossing the International Date Line.

Below each city's time, the time difference from Seoul is displayed in formats like +14 hours or -7 hours, allowing you to grasp time differences at a glance. Cities in the same timezone as Seoul show 'Same time'. This information is very useful when making international calls or scheduling online meetings. For example, when Seoul is 9 PM, New York is 8 AM (-14 hours), so meetings can proceed during business hours in both locations.

Daylight Saving Time is a system that advances clocks by one hour during summer to take advantage of later sunsets. Many countries including the US and Europe implement it, and time differences vary by 1 hour during implementation periods. Our world clock automatically reflects each region's DST to always display accurate time. In the US, it starts on the second Sunday in March and ends on the first Sunday in November, while Europe starts on the last Sunday in March and ends on the last Sunday in October.

The world clock is an essential tool for coordinating international meeting times. When planning meetings with participants from multiple countries, you can simultaneously check each participant's local time to find a suitable time for everyone. For example, with participants in Seoul, London, and New York, Seoul 9 PM = London 1 PM = New York 8 AM, allowing meetings during business hours in all three regions.

The world clock is very useful when planning international travel. You can check your destination's current time in advance to plan for jet lag adjustment. For example, when traveling from Korea to the US West Coast with a 17-hour time difference, gradually adjusting sleep times before departure makes jet lag adaptation easier. You can also identify appropriate times to contact family or friends in Korea during travel.

In the global business environment, the world clock is an essential tool. When communicating with overseas branches or partners, you can consider their local time to contact only during business hours. For example, when the Korean headquarters contacts the US branch, checking US time to send calls or emails only during business hours enables more effective communication.

While global financial markets operate 24 hours, each major exchange has different opening and closing times according to local time. Using the world clock, you can instantly determine current times and whether major exchanges like New York (NYSE, NASDAQ), London (LSE), Tokyo (TSE), and Hong Kong (HKEX) are open. For forex trading or international investment, knowing each market's trading hours precisely allows you to catch optimal trading timing.

Here are tips for using the world clock more effectively. First, memorize business hours of frequently contacted overseas regions to select appropriate contact times. Second, when hosting international meetings, set rotating meeting times considering each participant's timezone for fairness. Third, when traveling abroad, simultaneously monitor local and Korean times to avoid missing important schedules. Fourth, check local times in advance for real-time viewing of global events.