Offset
The time difference between Greenwich Mean Time and South Africa Time is 1 hour.
Greenwich Mean Time (BST) is behind South Africa Time (SAST).
BST: UTC+1
SAST: UTC+2
Greenwich Mean Time is currently observing daylight saving time; South Africa Time is not.
When to schedule
Business-hours overlap: 9 AM–4 PM in Greenwich Mean Time (10 AM–5 PM in South Africa Time).
Both teams are in working hours during this window on weekdays.
Suggested time: 12:00 PM Greenwich Mean Time (1:00 PM South Africa Time).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United Kingdom
- Good FridayFri, Apr 3
- Early May Bank HolidayMon, May 4
- Spring Bank HolidayMon, May 25
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
South Africa
- New Year's DayThu, Jan 1
- Human Rights DaySat, Mar 21
- Good FridayFri, Apr 3
- Family DayMon, Apr 6
- Freedom DayMon, Apr 27
- Workers' DayFri, May 1
- Youth DayTue, Jun 16
- National Women's DayMon, Aug 10
- Heritage DayThu, Sep 24
- Day of ReconciliationWed, Dec 16
- Christmas DayFri, Dec 25
- Day of GoodwillSat, Dec 26
About these zones
Greenwich Mean Time is also known as GMT, or BST. To call United Kingdom, dial +44.
South Africa Time is also known as SAST. To call South Africa, dial +27.
South Africa Time is approximately 5,650 miles southeast of Greenwich Mean Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| GMT | SAST | Day |
|---|---|---|
| 12:00 am | 1:00 am | Same day |
| 1:00 am | 2:00 am | Same day |
| 2:00 am | 3:00 am | Same day |
| 3:00 am | 4:00 am | Same day |
| 4:00 am | 5:00 am | Same day |
| 5:00 am | 6:00 am | Same day |
| 6:00 am | 7:00 am | Same day |
| 7:00 am | 8:00 am | Same day |
| 8:00 am | 9:00 am | Same day |
| 9:00 am | 10:00 am | Same day |
| 10:00 am | 11:00 am | Same day |
| 11:00 am | 12:00 pm | Same day |
| 12:00 pm | 1:00 pm | Same day |
| 1:00 pm | 2:00 pm | Same day |
| 2:00 pm | 3:00 pm | Same day |
| 3:00 pm | 4:00 pm | Same day |
| 4:00 pm | 5:00 pm | Same day |
| 5:00 pm | 6:00 pm | Same day |
| 6:00 pm | 7:00 pm | Same day |
| 7:00 pm | 8:00 pm | Same day |
| 8:00 pm | 9:00 pm | Same day |
| 9:00 pm | 10:00 pm | Same day |
| 10:00 pm | 11:00 pm | Same day |
| 11:00 pm | 12:00 am | +1 day |
Daylight saving time
Greenwich Mean Time observes daylight saving time; South Africa Time does not. The offset between the two zones changes when Greenwich Mean Time transitions: on Sunday, October 25, 2026, clocks fall back from BST to GMT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:47 AM
- Sunset
- 9:13 PM
- Day length
- 16h 25m
- Sunrise
- 6:50 AM
- Sunset
- 5:24 PM
- Day length
- 10h 34m
Daylight overlap: 10h 34m — 5:50 AM–4:24 PM in Greenwich Mean Time (6:50 AM–5:24 PM in South Africa Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Greenwich Mean Time
Cities in South Africa Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Greenwich Mean Time
- LCY
- LGW
- LHR
- LTN
- STN
- BHX
- EMA
- GLA
- PIK
- LBA
Airports in South Africa Time
- HLA
- JNB
- CPT
- DUR
Related conversions
Common conversions
- What is 9:00 am GMT in SAST?
- 9:00 am GMT is 10:00 am SAST.
- What is 12:00 pm GMT in SAST?
- 12:00 pm GMT is 1:00 pm SAST.
- What is 12:30 pm GMT in SAST?
- 12:30 pm GMT is 1:30 pm SAST.
- What is 2:00 pm GMT in SAST?
- 2:00 pm GMT is 3:00 pm SAST.
- What is 5:00 pm GMT in SAST?
- 5:00 pm GMT is 6:00 pm SAST.
- What is 11:30 pm GMT in SAST?
- 11:30 pm GMT is 12:30 am SAST, the next day.