JST to GST Converter & Meeting Planner
Quick answer: 9:00 AM JST = 4:00 AM GST (fixed +09:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Japan Standard Time (JST) and Gulf Standard Time (GST)? You need to account for the standard time difference. Gulf Standard Time is normally 5 hours behind Japan Standard Time. Whether you are coordinating between teams in Tokyo and Osaka and Dubai and Abu Dhabi, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM JST = 7:00 PM GST. The full 24-hour JST to GST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM JST = 10:00 AM GST.
| JST Time | GST Time |
|---|---|
| 12:00 AM (00:00) | 7:00 PM (19:00)-1 day |
| 1:00 AM (01:00) | 8:00 PM (20:00)-1 day |
| 2:00 AM (02:00) | 9:00 PM (21:00)-1 day |
| 3:00 AM (03:00) | 10:00 PM (22:00)-1 day |
| 4:00 AM (04:00) | 11:00 PM (23:00)-1 day |
| 5:00 AM (05:00) | 12:00 AM (00:00) |
| 6:00 AM (06:00) | 1:00 AM (01:00) |
| 7:00 AM (07:00) | 2:00 AM (02:00) |
| 8:00 AM (08:00) | 3:00 AM (03:00) |
| 9:00 AM (09:00) | 4:00 AM (04:00) |
| 10:00 AM (10:00) | 5:00 AM (05:00) |
| 11:00 AM (11:00) | 6:00 AM (06:00) |
| 12:00 PM (12:00) | 7:00 AM (07:00) |
| 1:00 PM (13:00) | 8:00 AM (08:00) |
| 2:00 PM (14:00) | 9:00 AM (09:00) |
| 3:00 PM (15:00) | 10:00 AM (10:00) |
| 4:00 PM (16:00) | 11:00 AM (11:00) |
| 5:00 PM (17:00) | 12:00 PM (12:00) |
| 6:00 PM (18:00) | 1:00 PM (13:00) |
| 7:00 PM (19:00) | 2:00 PM (14:00) |
| 8:00 PM (20:00) | 3:00 PM (15:00) |
| 9:00 PM (21:00) | 4:00 PM (16:00) |
| 10:00 PM (22:00) | 5:00 PM (17:00) |
| 11:00 PM (23:00) | 6:00 PM (18:00) |
Best time to call Dubai from Tokyo
For most work calls, compare the normal business day in Tokyo (JST) with the business day in Dubai (GST). JST commonly covers East Asia, while GST is mainly associated with Middle East, Gulf Region.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 2:00 PM - 6:00 PM JST, which corresponds to 9:00 AM - 1:00 PM GST. This window sits inside the typical JST workday (9:00 AM - 6:00 PM) and the GST workday (9:00 AM - 6:00 PM).
- DST Safety: Neither JST nor GST uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- Tokyo Stock Exchange (TSE): 09:00-15:00 local time in Tokyo.
- Dubai Financial Market (DFM): 10:00-15:00 local time in Dubai.
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Frequently Asked Questions
What is the time difference between JST and GST?
During standard time, Gulf Standard Time is 5 hours behind Japan Standard Time.
Does Japan observe Daylight Saving Time?
Japan has not observed Daylight Saving Time since 1951, when the practice introduced during the Allied occupation was abolished by the Japanese government. JST has remained fixed at UTC+9:00 ever since, and there is no current legislation to reintroduce DST in Japan.
Is JST the same as Korean Standard Time (KST)?
Yes, South Korea's Korean Standard Time (KST) operates at the same UTC+9:00 offset as JST, and South Korea also does not observe Daylight Saving Time. The two countries share an identical clock year-round, which simplifies scheduling for the significant trade, technology, and cultural exchange between Tokyo and Seoul.
Does Dubai use Daylight Saving Time?
Dubai and the entire United Arab Emirates do not observe Daylight Saving Time, remaining fixed at UTC+4:00 throughout the year. This means the offset between Dubai and DST-observing countries such as the UK or the US shifts by one hour each spring and autumn when those countries change their clocks.
Is GST the same as UAE Standard Time?
Yes, UAE Standard Time is the national designation for the same UTC+4:00 offset that Gulf Standard Time describes regionally. Both terms refer to the same fixed clock used across the United Arab Emirates, and GST additionally covers Oman under its regional name.