Tehran to KST Time Converter
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Quick answers
Selected conversion
3:30 pm15:30 IRST (UTC+3:30), Nov 1, 2026 = 9:00 pm21:00 KST (UTC+9), Nov 1, 2026
Tehran is 5 hours and 30 minutes behind KST.
How the time difference changes
Tehran is 5 hours and 30 minutes behind KST year-round.
Working hours of 9:00 am to 6:00 pm in Tehran correspond to 2:30 pm to 11:30 pm in KST.Working hours of 09:00 to 18:00 in Tehran correspond to 14:30 to 23:30 in KST.
Compare Tehran time with KST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
IRST (Iran Standard Time) is 5 hours and 30 minutes behind Korea Standard Time.
3:30 pm15:30 in Tehran, Iran is 9:00 pm21:00 in KST
Tehran to KST call time
Best time for a conference call or a meeting is between 9am-12:30pm09:00-12:30 in Tehran which corresponds to 2:30pm-6pm14:30-18:00 in KST
3:30 pm15:30 IRST (Iran Standard Time) (Tehran, Iran). Offset UTC +3:30 hours
9:00 pm21:00 Korea Standard Time (KST). Offset UTC +9:00 hours
3:30 pm15:30 Tehran, Iran / 9:00 pm21:00 KST
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| Tehran, Iran | KST |
|---|---|
| 5:30am | |
| 6:30am | |
| 7:30am | |
| 8:30am | |
| 9:30am | |
| 10:30am | |
| 11:30am | |
| 12:30pm | |
| 1:30pm | |
| 2:30pm | |
| 3:30pm | |
| 4:30pm | |
| 5:30pm | |
| 6:30pm | |
| 7:30pm | |
| 8:30pm | |
| 9:30pm | |
| 10:30pm | |
| 11:30pm | |
| 12:30am next day | |
| 1:30am next day | |
| 2:30am next day | |
| 3:30am next day | |
| 4:30am next day | |
| 05:30 | |
| 06:30 | |
| 07:30 | |
| 08:30 | |
| 09:30 | |
| 10:30 | |
| 11:30 | |
| 12:30 | |
| 13:30 | |
| 14:30 | |
| 15:30 | |
| 16:30 | |
| 17:30 | |
| 18:30 | |
| 19:30 | |
| 20:30 | |
| 21:30 | |
| 22:30 | |
| 23:30 | |
| 00:30 next day | |
| 01:30 next day | |
| 02:30 next day | |
| 03:30 next day | |
| 04:30 next day |
Tehran Time Zone and Facts
Time Zone
Tehran Facts
Korea Standard Time
Offset: KST is 9 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: North Korea, South Korea
Principal Cities: The largest city in the KST time zone is Seoul in South Korea, with about 10.349 million people. Other major cities in this time zone include Busan, Pyongyang, Incheon, Daegu.
Daylight Saving: Clocks in Korea Standard Time (KST) do not change for daylight saving time, so KST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
KST representations, usage and related time zones
- +09 - basic short
- +0900 - basic
- +09:00 - extended
- +0900 - sign character (+) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the east of the zero meridian.
- India - Military abbreviation for KST
- I - short form of 'India'
- Asia/Pyongyang
- Asia/Seoul
- ROK
- Korea Standard Time - UTC +9
- Pyongyang Time - UTC +8:30
- AWDT - Australian Western Daylight Time
- CHOST - Choibalsan Summer Time
- I - India Time Zone
- IRKST - Irkutsk Summer Time
- JST - Japan Standard Time
- KST - Korea Standard Time
- PWT - Palau Time
- TLT - East Timor Time
- ULAST - Ulaanbaatar Summer Time
- WIT - Eastern Indonesian Time
- YAKT - Yakutsk Time