SEL · UTC+9
Seoul서울
Day
Tue, September 1 Business hours
Same time as Seoul
The date is required to calculate each local date, daylight saving time, and the day–night boundary.
Move the pointer to find the nearest cityMove the map to aim the crosshair · pinch to zoom
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DayNightSunrise & sunset line☀Subsolar point
1.0× zoomMy cities
4Cities selected from search or the map are saved on this device.
Time difference from · Seoul
LON · UTC+1
London런던
Night
Tue, September 1
8 hr behind Seoul
NYC · UTC-4
New York뉴욕
Night
Tue, September 1
13 hr behind Seoul
SYD · UTC+10
Sydney시드니
Day
Tue, September 1 Business hours
1 hr ahead of Seoul
Guide / reading world time
Use the world clock with more context
Compare location, local date, time-zone difference, and daylight in one view instead of reading an isolated list of times.
Search and save cities
Search by Korean or English city and country names. The selected location appears on the map and is saved to your city list.
Compare any date and time
The date determines daylight saving time and each city’s local date. Change it directly or step by one hour to plan meetings and travel.
Read daylight at a glance
The map shading follows the Sun at the selected date and time. The gold dashed line marks the sunrise and sunset boundary.
Map and daylight calculation
Borders use Natural Earth map data. The glowing Sun is the subsolar point at the selected time—not a city. The daylight boundary is estimated from solar declination and the equation of time; terrain and atmospheric conditions can shift actual sunrise or sunset by several minutes.
Frequently asked questions
Does the clock include daylight saving time?
Yes. Each city uses an IANA time zone, so the standard-time or daylight-saving offset for the selected date is applied automatically.
Why does the reference time include a date?
Local dates can differ across cities, daylight-saving rules depend on the date, and the Sun’s position changes throughout the year. The date is therefore required for accurate local times and daylight shading.
Is the glowing yellow point a city?
No. It marks the subsolar point, where the Sun is directly overhead at the selected moment. It moves with time and is unrelated to the saved-city list.
Will my selected cities remain next time?
Cities selected from search or the map are stored locally in this browser. You can remove any one of them from its city card.