GST to CAT Converter & Meeting Planner
Quick answer: 9:00 AM GST = 7:00 AM CAT (fixed +04:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Gulf Standard Time (GST) and Central Africa Time (CAT)? You need to account for the standard time difference. Central Africa Time is normally 2 hours behind Gulf Standard Time. Whether you are coordinating between teams in Dubai and Abu Dhabi and Johannesburg and Harare, 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 GST = 10:00 PM CAT. The full 24-hour GST to CAT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM GST = 1:00 PM CAT.
| GST Time | CAT Time |
|---|---|
| 12:00 AM (00:00) | 10:00 PM (22:00)-1 day |
| 1:00 AM (01:00) | 11:00 PM (23:00)-1 day |
| 2:00 AM (02:00) | 12:00 AM (00:00) |
| 3:00 AM (03:00) | 1:00 AM (01:00) |
| 4:00 AM (04:00) | 2:00 AM (02:00) |
| 5:00 AM (05:00) | 3:00 AM (03:00) |
| 6:00 AM (06:00) | 4:00 AM (04:00) |
| 7:00 AM (07:00) | 5:00 AM (05:00) |
| 8:00 AM (08:00) | 6:00 AM (06:00) |
| 9:00 AM (09:00) | 7:00 AM (07:00) |
| 10:00 AM (10:00) | 8:00 AM (08:00) |
| 11:00 AM (11:00) | 9:00 AM (09:00) |
| 12:00 PM (12:00) | 10:00 AM (10:00) |
| 1:00 PM (13:00) | 11:00 AM (11:00) |
| 2:00 PM (14:00) | 12:00 PM (12:00) |
| 3:00 PM (15:00) | 1:00 PM (13:00) |
| 4:00 PM (16:00) | 2:00 PM (14:00) |
| 5:00 PM (17:00) | 3:00 PM (15:00) |
| 6:00 PM (18:00) | 4:00 PM (16:00) |
| 7:00 PM (19:00) | 5:00 PM (17:00) |
| 8:00 PM (20:00) | 6:00 PM (18:00) |
| 9:00 PM (21:00) | 7:00 PM (19:00) |
| 10:00 PM (22:00) | 8:00 PM (20:00) |
| 11:00 PM (23:00) | 9:00 PM (21:00) |
Best time to call Johannesburg from Dubai
For most work calls, compare the normal business day in Dubai (GST) with the business day in Johannesburg (CAT). GST commonly covers Middle East, Gulf Region, while CAT is mainly associated with Southern Africa, Central Africa.
⚠️ 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 10:00 AM - 6:00 PM GST, which corresponds to 8:00 AM - 4:00 PM CAT. This window sits inside the typical GST workday (9:00 AM - 6:00 PM) and the CAT workday (8:00 AM - 5:00 PM).
- DST Safety: Neither GST nor CAT uses Daylight Saving Time in our dataset, making business-hour relationships stable year-round.
- Dubai Financial Market (DFM): 10:00-15:00 local time in Dubai.
- Johannesburg Stock Exchange (JSE): 09:00-17:00 local time in Johannesburg.
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Frequently Asked Questions
What is the time difference between GST and CAT?
During standard time, Central Africa Time is 2 hours behind Gulf Standard Time.
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.
Does the Central Africa Time zone observe Daylight Saving Time?
None of the countries observing Central Africa Time use Daylight Saving Time. South Africa abolished DST in 1994, and no other CAT-observing nation currently applies seasonal clock changes — CAT remains permanently fixed at UTC+02:00 throughout the year.
Which major countries use Central Africa Time (CAT)?
Central Africa Time is observed by South Africa, Zimbabwe, Zambia, Botswana, Mozambique, Malawi, and Eswatini. South Africa is the zone's dominant economy, with Johannesburg functioning as the region's primary financial center and home to the Johannesburg Stock Exchange (JSE), Africa's largest equity market by capitalization.