Current Time in Seongnam-si
How to Check Current Time in Seongnam-si, South Korea
Open the Seongnam-si time converter page: Visit https://www.xconvert.com/time-converter/south-korea/seongnam-si. The page loads with Seongnam-si pre-selected in the Asia/Seoul time zone, which is useful if you are planning a call with a client in Pangyo Techno Valley, checking support coverage for a Korean gaming or IT team, or confirming local time before travel into the Seoul Capital Area.
Add comparison cities relevant to your schedule: Click + Add City and search for cities such as New York, London, and Tokyo. These are practical comparisons for Seongnam-si because Korean companies often coordinate with US software and finance teams, UK regional partners, and Japan-based suppliers or headquarters operating on nearby Asian business hours.
Drag across the grid to compare a workable meeting window: Click Select if needed, then drag on Seongnam-si’s 24-hour timeline to highlight a range such as 9:00 AM to 11:00 AM KST. That selection shows in other rows as 8:00 PM to 10:00 PM in New York the previous day during Eastern Standard Time, 7:00 PM to 9:00 PM in New York during Eastern Daylight Time, 12:00 AM to 2:00 AM in London during GMT, 1:00 AM to 3:00 AM in London during BST, and 9:00 AM to 11:00 AM in Tokyo, helping you see immediately whether a Korea morning standup works for overseas teams.
Export the selected time for your team or clients: After selecting a range, use the export options shown on the page: ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is especially helpful when sending a meeting for a cross-border product launch, investor update, or engineering handoff, because everyone receives the event in their own local time instead of manually converting from Korea Standard Time.
About Seongnam-si Time Zone
Seongnam-si uses the Asia/Seoul IANA time zone, which runs on Korea Standard Time (KST), UTC+9. This offset stays fixed throughout the year, so local time in Seongnam-si is always 9 hours ahead of Coordinated Universal Time. South Korea does not currently observe daylight saving time, which makes scheduling more predictable than with countries that shift clocks in March and October or November.
Seongnam-si is located in Gyeonggi Province, immediately southeast of Seoul in the Seoul Capital Area, so it shares the same official time as Seoul, Suwon, Incheon, and the rest of South Korea. In practical terms, that means businesses in Seongnam-si operate on the same clock as major Korean technology, manufacturing, logistics, and government centers. This consistency matters for firms in Pangyo, where game studios, software companies, and startup offices often coordinate with partners across Asia, North America, and Europe.
Compared with neighboring time zones, Seongnam-si is 1 hour behind Tokyo (also UTC+9? Actually Tokyo is the same UTC+9, so there is no time difference), 1 hour ahead of Beijing and Hong Kong (UTC+8), and 2 hours behind Sydney during Australian Eastern Daylight Time (UTC+11) but 1 hour behind Sydney during Australian Eastern Standard Time (UTC+10). Because South Korea does not change clocks seasonally, the time gap between Seongnam-si and cities in the US, UK, and Australia changes when those countries enter or leave DST. For example, London is usually 9 hours behind Seongnam-si in winter and 8 hours behind during British Summer Time.
Seongnam-si City Details
Seongnam-si is a major city in South Korea with a population of 1,031,935, making it one of the largest urban centers in Gyeonggi Province. It sits at 37.43861° N, 127.13778° E, placing it just southeast of Seoul and within one of East Asia’s most important metropolitan economies.
The local currency is the South Korean won (KRW), which is used for everything from hotel bookings and taxi fares to business expenses and retail purchases. If you need to call Seongnam-si from abroad, South Korea’s country dialing code is +82; domestic and international business contacts, hotels, and service providers in the city use this national code.
Seongnam-si is especially well known for Pangyo Techno Valley, a major technology and startup hub often compared with a Korean version of Silicon Valley. That makes accurate time conversion especially useful for software development, gaming, e-commerce, semiconductors, and venture capital communication with teams in the US, Europe, Japan, Singapore, and the Middle East.
Time Differences from Seongnam-si
Seongnam-si is in UTC+9, so its time difference with other major business cities depends on whether those places are on standard time or daylight saving time.
New York
- 14 hours behind Seongnam-si during Eastern Standard Time (UTC-5)
- 13 hours behind during Eastern Daylight Time (UTC-4)
- When it’s 9:00 AM in Seongnam-si, it’s 7:00 PM the previous day in New York during EDT or 8:00 PM the previous day during EST.
- This often makes late afternoon in Korea the most realistic overlap for US East Coast calls.
London
- 9 hours behind Seongnam-si during Greenwich Mean Time (UTC+0)
- 8 hours behind during British Summer Time (UTC+1)
- When it’s 9:00 AM in Seongnam-si, it’s 12:00 AM in London during GMT or 1:00 AM during BST.
- For UK-Korea business calls, Korea late afternoon often aligns better with UK morning.
Tokyo
- No time difference
- Tokyo also uses UTC+9 and does not currently observe daylight saving time
- When it’s 9:00 AM in Seongnam-si, it’s 9:00 AM in Tokyo
- This same-time alignment is convenient for regional operations, supplier coordination, and same-day travel planning between Korea and Japan.
Sydney
- 1 hour ahead of Seongnam-si during Australian Eastern Standard Time (UTC+10)
- 2 hours ahead during Australian Eastern Daylight Time (UTC+11)
- When it’s 9:00 AM in Seongnam-si, it’s 10:00 AM in Sydney during AEST or 11:00 AM during AEDT.
- This makes Korea morning to midday a practical overlap for Australia-based teams.
Dubai
- 5 hours behind Seongnam-si all year, because Dubai uses Gulf Standard Time (UTC+4) and does not observe DST
- When it’s 9:00 AM in Seongnam-si, it’s 4:00 AM in Dubai
- For Korea-UAE coordination, Seongnam-si afternoon is usually better for trade, logistics, and aviation-related calls.
Frequently Asked Questions
What time zone is Seongnam-si in?
Seongnam-si is in the Asia/Seoul time zone. Its standard local time is Korea Standard Time (KST), which is UTC+9 year-round. This is the same time used across all of South Korea, including Seoul, Busan, Incheon, and Suwon.
Does Seongnam-si observe daylight saving time?
No, Seongnam-si does not currently observe daylight saving time. South Korea stays on UTC+9 throughout the entire year, so the local clock does not move forward in spring or backward in autumn. This makes recurring scheduling easier, although the time difference with New York, London, and Sydney still changes when those cities switch DST on or off.
What is the time difference between Seongnam-si and New York?
The difference depends on the season in New York. Seongnam-si is 14 hours ahead of New York during Eastern Standard Time and 13 hours ahead during Eastern Daylight Time. For example, when it is 9:00 AM in Seongnam-si, it is 8:00 PM the previous day in New York during EST or 7:00 PM the previous day during EDT.
Best time to call Seongnam-si from US or UK?
From the US East Coast, one of the most practical windows is often Seongnam-si 8:00 AM to 10:00 AM, which corresponds to US evening on the previous day. From the UK, a better overlap is usually Seongnam-si 4:00 PM to 6:00 PM, which maps to UK 8:00 AM to 10:00 AM during BST or 7:00 AM to 9:00 AM during GMT. These windows are commonly used for remote product meetings, supplier updates, and customer support coordination.
What is the UTC offset for Seongnam-si?
Seongnam-si uses a fixed UTC offset of UTC+9. In practical terms, that means local time in Seongnam-si is always 9 hours ahead of UTC, with no seasonal clock changes. This fixed offset is helpful for international teams because Korea’s side of the schedule remains stable all year.
What currency does Seongnam-si use?
Seongnam-si uses the South Korean won, abbreviated as KRW. If you are traveling for business, paying local vendors, or estimating costs for hotels, meals, and transport in the Seoul metropolitan area, prices will be quoted in won rather than US dollars, euros, or yen.
Is Seongnam-si the same time as Seoul?
Yes, Seongnam-si and Seoul are on exactly the same local time because both use Asia/Seoul (UTC+9). The two cities are part of the Seoul Capital Area, so there is no time conversion needed when commuting, scheduling meetings, or planning flights and rail connections between them.
How far ahead is Seongnam-si from London?
Seongnam-si is 9 hours ahead of London when the UK is on GMT, and 8 hours ahead when the UK is on British Summer Time. For example, 6:00 PM in Seongnam-si is 9:00 AM in London during GMT or 10:00 AM in London during BST, which is why Korea late afternoon is often a strong choice for UK-Korea business calls.