JST to GST Converter
Quick answers
JST is 5 hours ahead of GST. JST uses GMT +9, and GST uses GMT +4 for this comparison.
For example, 9:00 pm JST is 4:00 pm GST. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 2pm-5pm JST, which is 9am-12pm GST.
Compare JST time with GST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Japan Standard Time is 5 hours ahead of Gulf Standard Time
9:00 pm21:00 in JST is 4:00 pm16:00 in GST
JST to GST call time
Best time for a conference call or a meeting is between 2pm-5pm in JST which corresponds to 9am-12pm in GST
9:00 pm21:00 Japan Standard Time (JST). Offset UTC +9:00 hours
4:00 pm16:00 Gulf Standard Time (GST). Offset UTC +4:00 hours
9:00 pm21:00 JST / 4:00 pm16:00 GST
| JST | GST |
|---|---|
| 12am (midnight) | 7pm |
| 1am | 8pm |
| 2am | 9pm |
| 3am | 10pm |
| 4am | 11pm |
| 5am | 12am (midnight) |
| 6am | 1am |
| 7am | 2am |
| 8am | 3am |
| 9am | 4am |
| 10am | 5am |
| 11am | 6am |
| 12pm (noon) | 7am |
| 1pm | 8am |
| 2pm | 9am |
| 3pm | 10am |
| 4pm | 11am |
| 5pm | 12pm (noon) |
| 6pm | 1pm |
| 7pm | 2pm |
| 8pm | 3pm |
| 9pm | 4pm |
| 10pm | 5pm |
| 11pm | 6pm |
| 00:00 | 19:00 |
| 01:00 | 20:00 |
| 02:00 | 21:00 |
| 03:00 | 22:00 |
| 04:00 | 23:00 |
| 05:00 | 00:00 |
| 06:00 | 01:00 |
| 07:00 | 02:00 |
| 08:00 | 03:00 |
| 09:00 | 04:00 |
| 10:00 | 05:00 |
| 11:00 | 06:00 |
| 12:00 | 07:00 |
| 13:00 | 08:00 |
| 14:00 | 09:00 |
| 15:00 | 10:00 |
| 16:00 | 11:00 |
| 17:00 | 12:00 |
| 18:00 | 13:00 |
| 19:00 | 14:00 |
| 20:00 | 15:00 |
| 21:00 | 16:00 |
| 22:00 | 17:00 |
| 23:00 | 18:00 |
Japan Standard Time
Offset: JST is 9 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Japan
Principal Cities: The largest city in the JST time zone is Tokyo in Japan, with about 8.337 million people. Other major cities in this time zone include Yokohama, Osaka shi, Nagoya shi, Sapporo.
Daylight Saving: Clocks in Japan Standard Time (JST) do not change for daylight saving time, so JST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
JST 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 JST
- I - short form of 'India'
- Asia/Tokyo
- Japan
- 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
Gulf Standard Time
Offset: GST is 4 hours ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: United Arab Emirates
Principal Cities: The largest city in the GST time zone is Dubai in United Arab Emirates, with about 1.137 million people. Other major cities in this time zone include Abu Dhabi, Sharjah, Al Ain, Ajman.
Daylight Saving: Clocks in Gulf Standard Time (GST) do not change for daylight saving time, so GST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
GST representations, usage and related time zones
- +04 - basic short
- +0400 - basic
- +04:00 - extended
- +0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the east of the zero meridian.
- Delta - Military abbreviation for GST
- D - short form of 'Delta'
- KUYT - Kuybyshev Time
- MSD - Moscow Daylight Time
- SAMT - Samara Time
- AMT - Armenia Time
- AZT - Azerbaijan Time
- D - Delta Time Zone
- GET - Georgia Standard Time
- GST - Gulf Standard Time
- MUT - Mauritius Time
- RET - Reunion Time
- SCT - Seychelles Time