BST to SAST Time Converter
SAST is 1 hour ahead of BST. BST is UTC+1:00, and SAST is UTC+2:00.
Best Time to Call Between BST and SAST
Both zones are inside normal business hours between 9:00 AM and 4:00 PM BST — that's 10:00 AM to 5:00 PM SAST. That's a 7-hour window.
both at work BST only SAST only neither — hours along the strip are BST.
Common Times Converted
BST on the left, SAST on the right.
BST to SAST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | SAST | Working hours |
|---|---|---|
| 12:00 AM | 1:00 AM | — |
| 1:00 AM | 2:00 AM | — |
| 2:00 AM | 3:00 AM | — |
| 3:00 AM | 4:00 AM | — |
| 4:00 AM | 5:00 AM | — |
| 5:00 AM | 6:00 AM | — |
| 6:00 AM | 7:00 AM | — |
| 7:00 AM | 8:00 AM | — |
| 8:00 AM | 9:00 AM | SAST only |
| 9:00 AM | 10:00 AM | Both zones |
| 10:00 AM | 11:00 AM | Both zones |
| 11:00 AM | 12:00 PM | Both zones |
| 12:00 PM | 1:00 PM | Both zones |
| 1:00 PM | 2:00 PM | Both zones |
| 2:00 PM | 3:00 PM | Both zones |
| 3:00 PM | 4:00 PM | Both zones |
| 4:00 PM | 5:00 PM | BST only |
| 5:00 PM | 6:00 PM | — |
| 6:00 PM | 7:00 PM | — |
| 7:00 PM | 8:00 PM | — |
| 8:00 PM | 9:00 PM | — |
| 9:00 PM | 10:00 PM | — |
| 10:00 PM | 11:00 PM | — |
| 11:00 PM | 12:00 AM next day | — |
What BST and SAST Actually Are
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
SAST — South Africa Standard Time
Johannesburg, Cape Town, Durban, Pretoria. Standing at UTC+2:00 as written, and the region does not change its clocks, so that offset holds all year. South Africa does not observe daylight saving, so this offset is fixed year-round.
South Africa last used daylight saving during the Second World War and has stayed on a single fixed offset ever since.
What This Means in Practice
This gap is not fixed
BST changes its clocks and SAST does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, October 25, 2026 unless someone resets it.
Close enough to share a working day
At only 1 hour apart, the two working days overlap almost completely. Scheduling is barely constrained by the difference.
Major Cities in Each Zone
Cities on BST
Cities on SAST
Frequently Asked Questions
What is the time difference between BST and SAST?
SAST is 1 hour ahead of BST.
What is 9:00 AM BST in SAST?
9:00 AM BST is 10:00 AM SAST.
What are the best hours to schedule a call between BST and SAST?
Between 9:00 AM and 4:00 PM BST, which is 10:00 AM to 5:00 PM SAST. Both sides are inside normal business hours through that window.
Does the difference between BST and SAST change during the year?
Yes. BST observes daylight saving and SAST does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
Does SAST always mean South Africa Standard Time?
South Africa does not observe daylight saving, so this offset is fixed year-round.