JST to GST Converter
GST is 5 hours behind JST. 9:00 AM JST = 4:00 AM GST.
GST is 5 hours behind JST. To convert JST to GST, subtract 5 hours from the JST time: 9:00 AM JST = 4:00 AM GST.
JST (Japan Time) is used in Japan. GST (Gulf Time) is used in United Arab Emirates and Oman.
JST to GST time conversion table
JST to GST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| JST | GST | Day |
|---|---|---|
| 12:00 AM JST | 7:00 PM GST | previous day |
| 1:00 AM JST | 8:00 PM GST | previous day |
| 2:00 AM JST | 9:00 PM GST | previous day |
| 3:00 AM JST | 10:00 PM GST | previous day |
| 4:00 AM JST | 11:00 PM GST | previous day |
| 5:00 AM JST | 12:00 AM GST | night |
| 6:00 AM JST | 1:00 AM GST | night |
| 7:00 AM JST | 2:00 AM GST | night |
| 8:00 AM JST | 3:00 AM GST | night |
| 9:00 AM JST | 4:00 AM GST | night |
| 10:00 AM JST | 5:00 AM GST | night |
| 11:00 AM JST | 6:00 AM GST | — |
| 12:00 PM JST | 7:00 AM GST | — |
| 1:00 PM JST | 8:00 AM GST | — |
| 2:00 PM JST | 9:00 AM GST | work hours |
| 3:00 PM JST | 10:00 AM GST | work hours |
| 4:00 PM JST | 11:00 AM GST | work hours |
| 5:00 PM JST | 12:00 PM GST | — |
| 6:00 PM JST | 1:00 PM GST | — |
| 7:00 PM JST | 2:00 PM GST | — |
| 8:00 PM JST | 3:00 PM GST | — |
| 9:00 PM JST | 4:00 PM GST | — |
| 10:00 PM JST | 5:00 PM GST | — |
| 11:00 PM JST | 6:00 PM GST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert JST to GST
Subtract 5 hours from the JST time to get GST.
Example: 9:00 AM JST = 4:00 AM GST.
Across midnight: 1:00 AM JST = 8:00 PM GST (previous day). The date changes, so always check the day as well as the hour.
Time difference between JST and GST
The time difference between JST and GST is 5 hours all year – GST is behind JST.
JST and GST during daylight saving time
- JST does not observe daylight saving time; it stays on UTC+9 all year.
- GST does not observe daylight saving time; it stays on UTC+4 all year.
Best time for a meeting between JST and GST
JST and GST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM JST lands between 9:00 AM and 12:00 PM GST, inside working hours for both.
JST to GST FAQ
What is the time difference between JST and GST?
GST is 5 hours behind JST all year. 9:00 AM JST = 4:00 AM GST.
What is 9 AM JST in GST?
9:00 AM JST is 4:00 AM GST.
What is 12 PM (noon) JST in GST?
12:00 PM JST is 7:00 AM GST.
Is GST ahead of or behind JST?
GST is 5 hours behind JST, so it is earlier in GST than in JST.
Does JST change for daylight saving time?
No. JST stays on the same offset all year, so conversions never shift for daylight saving time.
Does GST change for daylight saving time?
No. GST stays on the same offset all year, so conversions never shift for daylight saving time.
What is the best time for a meeting between JST and GST?
JST and GST share 3 hours of the 9 AM–5 PM working day. Any time between 2:00 PM and 5:00 PM JST lands between 9:00 AM and 12:00 PM GST, inside working hours for both.
Related conversions
Convert GST to JST
Convert JST to other time zones
Convert other time zones to GST
Learn more
Updated 7 November 2026. Time zone data: IANA tz database.