GST to KST Converter
Convert time between Gulf Standard Time (GST) and Korea Standard Time (KST)
Gulf Standard Time (GST)
Korea Standard Time (KST)
Time Difference
Korea Standard Time (KST) is 0 hours ahead of Gulf Standard Time (GST)
Select Date
Select Time
Quick Reference
| GST | KST |
|---|---|
| 06:00 | 11:00 |
| 08:00 | 13:00 |
| 10:00 | 15:00 |
| 12:00 | 17:00 |
| 14:00 | 19:00 |
| 16:00 | 21:00 |
| 18:00 | 23:00 |
| 20:00 | 01:00 |
| 22:00 | 03:00 |
| 00:00 | 05:00 |
| 02:00 | 07:00 |
| 04:00 | 09:00 |
Top 10 Most Common Time Zones
| Abbreviation | Full Name | UTC Offset | Typical Use |
|---|---|---|---|
| UTC | Coordinated Universal Time | UTC ±0 | Global reference standard (servers, logs, APIs) |
| EST / EDT | Eastern (US) Time | UTC −5 / −4 | New York, Toronto — North American business hub |
| CST / CDT | Central (US) Time | UTC −6 / −5 | Chicago, Dallas — US central business region |
| PST / PDT | Pacific (US) Time | UTC −8 / −7 | San Francisco, Los Angeles — tech industry standard |
| GMT / BST | Greenwich Mean / British Summer Time | UTC 0 / +1 | UK, used globally as a reference with UTC |
| CET / CEST | Central European (Summer) Time | UTC +1 / +2 | Paris, Berlin, Amsterdam — EU business core |
| IST | India Standard Time | UTC +5:30 | India — major IT & outsourcing region |
| CST | China Standard Time | UTC +8 | Beijing, Shanghai — East Asia business hub |
| JST | Japan Standard Time | UTC +9 | Tokyo — finance & tech hub |
| AEST / AEDT | Australian Eastern (Daylight) Time | UTC +10 / +11 | Sydney, Melbourne — APAC regional business |
Why Time Zone Abbreviations Are Ambiguous
Unlike standardized identifiers (like America/New_York or Europe/London from the IANA tz database), abbreviations such as "CST" or "IST" are not globally unique. They can refer to different time zones depending on context — country, region, or even time of year (due to daylight saving time).
Common Ambiguous Time Zone Abbreviations
| Abbrev. | Common Meaning(s) | UTC Offset | Region(s) |
|---|---|---|---|
| CST | Central Standard Time / China Standard Time / Cuba Standard Time | UTC−6 / UTC+8 / UTC−5 | North America, China, Cuba |
| IST | Indian Standard Time / Irish Standard Time / Israel Standard Time | UTC+5:30 / UTC+1 / UTC+2 | India, Ireland, Israel |
| AST | Atlantic Standard Time / Arabia Standard Time | UTC−4 / UTC+3 | Caribbean, Canada, Middle East |
| PST | Pacific Standard Time / Philippine Standard Time | UTC−8 / UTC+8 | North America, Philippines |
| EST | Eastern Standard Time (North America / Australia) | UTC−5 / UTC+10 | North America, Australia |
✅ Best Practice
To avoid ambiguity, always:
- Use IANA tz identifiers — e.g.,
America/New_Yorkinstead of "EST" - Specify UTC offset explicitly — e.g.,
UTC−5when abbreviations must be used - Include the full timezone name — e.g., "Eastern Standard Time (EST)" with UTC offset
About GST to KST Time Conversion
Converting time between Gulf Standard Time (GST) and Korea Standard Time (KST) involves a fixed 5-hour difference. GST is UTC+4 with no daylight saving time, while KST is UTC+9 — also with no daylight saving time. This makes KST always 5 hours ahead of GST, year-round. The predictability of this pair makes cross-timezone scheduling between the Gulf and South Korea exceptionally straightforward.
This time zone converter uses the IANA timezone database to confirm accurate results. South Korea and the Gulf region share strong economic ties through energy trade, automotive exports, technology partnerships, and construction contracts — Korean companies have long played a major role in Gulf infrastructure projects. Whether scheduling business calls between Dubai and Seoul, managing trade contracts, or planning travel between the two regions, our converter delivers consistent results all year.
Common Use Cases for GST to KST Conversion
Business & Work
- Scheduling morning Seoul meetings aligned with the start of the Dubai workday
- Coordinating energy trade, shipbuilding, and automotive operations between Gulf and Korean firms
- Planning project calls with teams in Seoul, Busan, or Incheon
Personal & Travel
- Staying connected with family and friends between the Gulf region and South Korea
- Planning travel between UAE and Korea with accurate flight and arrival timing
- Following live K-pop releases, sports events, and Korean broadcasts from Gulf regions
Time Zone Information
Gulf Standard Time (GST)
- UTC Offset: UTC+4 (no DST observed)
- IANA Timezone: Asia/Dubai
- Daylight Saving: Gulf Standard Time does not observe daylight saving time
- Major Cities: Dubai, Abu Dhabi, Sharjah, Muscat, Ras Al Khaimah
- Coverage: United Arab Emirates, Oman, and the broader Gulf region
Korea Standard Time (KST)
- UTC Offset: UTC+9 (no DST observed)
- IANA Timezone: Asia/Seoul
- Daylight Saving: Korea Standard Time does not observe daylight saving time
- Major Cities: Seoul, Busan, Incheon, Daegu, Daejeon
- Coverage: South Korea (Republic of Korea)
Quick Reference: GST to KST
Remember: KST is always 5 hours ahead of GST. Neither timezone observes daylight saving time, so this offset never changes throughout the year.
Frequently Asked Questions
What is the time difference between GST and KST?
Gulf Standard Time (GST) is UTC+4, while Korea Standard Time (KST) is UTC+9. KST is exactly 5 hours ahead of GST. When it's 12:00 PM (noon) in Dubai (GST), it's 5:00 PM in Seoul (KST). Because neither timezone observes daylight saving time, this 5-hour difference is fixed and consistent year-round.
Does either GST or KST observe daylight saving time?
No. Both Gulf Standard Time (GST) and Korea Standard Time (KST) are fixed offsets with no daylight saving time. The UAE and Oman stay on UTC+4 year-round, and South Korea stays on UTC+9 year-round. Korea briefly used DST in the 1980s but discontinued it after the 1988 Seoul Olympics. This makes GST-KST one of the most stable cross-continental timezone pairs.
What are the best times to schedule calls between GST and KST?
With KST 5 hours ahead, the Seoul workday starts before Dubai's. Tokyo-style early calls work well: Seoul business hours (9 AM–6 PM KST) align with 4 AM–1 PM GST. The practical overlap window is 9 AM–1 PM GST (2 PM–6 PM KST) — Dubai morning meets Seoul afternoon. A 10 AM GST call equals 3 PM KST — an excellent mid-afternoon slot for Korea.
Why does South Korea not observe daylight saving time?
South Korea briefly used DST in 1948–1951 and again in 1987–1988 around the Seoul Olympics, but discontinued it due to limited public benefit and the relatively short summer-daylight gain at Korea's latitude. Since 1988, Korea has maintained a single, fixed UTC+9 offset year-round. Proposals to reintroduce DST have surfaced periodically but none have passed.
Which countries and regions use KST (Korea Standard Time)?
Korea Standard Time (UTC+9) is used exclusively across all of South Korea, including Seoul, Busan, Incheon, Daegu, and Daejeon. Japan (Japan Standard Time, JST) and parts of Indonesia also share the UTC+9 offset. KST has no daylight saving time and applies uniformly across the entire country.
Which countries use GST (Gulf Standard Time)?
Gulf Standard Time (UTC+4) is used year-round by the United Arab Emirates (Dubai, Abu Dhabi, Sharjah) and Oman (Muscat). It is also shared by some Russian regions and parts of the Indian Ocean. In the Gulf context, GST specifically refers to the UAE and Oman time zone, which observes no daylight saving time.
Pro Tips
- • KST is always 5 hours ahead of GST — add 5 hours to any Dubai time to get Seoul time. No seasonal adjustments, ever.
- • Neither GST nor KST observes daylight saving time. Set a recurring meeting once and it will always be correct.
- • Best overlap window: 9 AM–1 PM GST (2 PM–6 PM KST) — Dubai morning aligning with Seoul afternoon.
- • KST shares the UTC+9 offset with Tokyo (JST) — same conversion applies to Japanese contacts.
- • The Korea Exchange (KOSPI) opens at 9 AM KST = 4 AM GST — pre-Gulf workday for market-related calls.
- • Korean public holidays like Chuseok (autumn) and Seollal (lunar new year) significantly reduce business activity — factor in when scheduling.