GST to JST Converter – Gulf Standard Time to Japan Standard Time
JST is 5 hours ahead of GST. GST (Gulf Standard Time) is UTC+4 all year, while JST (Japan Standard Time) is UTC+9 all year. The live clocks below show the current time in both zones, updated every second.
GST to JST Conversion Table (Hour by Hour)
Standard-time conversion from Gulf Standard Time to Japan Standard Time.
| GST (UTC+4) | JST (UTC+9) |
|---|---|
| 12:00 AM | 5:00 AM |
| 1:00 AM | 6:00 AM |
| 2:00 AM | 7:00 AM |
| 3:00 AM | 8:00 AM |
| 4:00 AM | 9:00 AM |
| 5:00 AM | 10:00 AM |
| 6:00 AM | 11:00 AM |
| 7:00 AM | 12:00 PM |
| 8:00 AM | 1:00 PM |
| 9:00 AM | 2:00 PM |
| 10:00 AM | 3:00 PM |
| 11:00 AM | 4:00 PM |
| 12:00 PM | 5:00 PM |
| 1:00 PM | 6:00 PM |
| 2:00 PM | 7:00 PM |
| 3:00 PM | 8:00 PM |
| 4:00 PM | 9:00 PM |
| 5:00 PM | 10:00 PM |
| 6:00 PM | 11:00 PM |
| 7:00 PM | 12:00 AM (next day) |
| 8:00 PM | 1:00 AM (next day) |
| 9:00 PM | 2:00 AM (next day) |
| 10:00 PM | 3:00 AM (next day) |
| 11:00 PM | 4:00 AM (next day) |
Frequently Asked Questions
What is the time difference between GST and JST?
JST is 5 hours ahead of GST. GST (Gulf Standard Time) is UTC+4 and JST (Japan Standard Time) is UTC+9.
How do I convert GST to JST?
Take your time in GST and add 5 hours. For example, 9:00 AM GST is 2:00 PM in JST. The live clocks at the top of this page always show the current conversion.
Does daylight saving time affect GST to JST conversion?
No. Neither GST nor JST observes daylight saving time, so the difference between them is the same all year round.
What is the best time for a meeting between GST and JST?
Look for overlap between 9:00 AM-6:00 PM working hours in both zones using the conversion table above. JST is 5 hours ahead of GST, so there is normally several hours of business-hours overlap.