GMT to SAST Time Converter

Convert Greenwich Mean Time (GMT) to South Africa Standard Time (SAST). Both time zones are shown live below; current offset between them is 1 hour ahead.

London · Greenwich Mean Time
22:06:04
Sunday, May 10, 2026
GMT+1 · UTC+01:00
Johannesburg · South Africa Standard Time
23:06:04
Sunday, May 10, 2026
GMT+2 · UTC+02:00

Convert a specific time

From: GMT (London)
To: SAST (Johannesburg)
--:--

Daylight Saving status right now

GMT (Greenwich Mean Time)
Observes DST
Yes
In DST right now
Yes
Next fall back
2026-10-25
Offset shift
UTC+01:00 → UTC+00:00
SAST (South Africa Standard Time)
Observes DST
No

Heads up: GMT observes DST while SAST does not. The 1-hour difference shown above will shift by one hour when GMT starts or ends DST.

When can GMT and SAST meet?

00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
GMT
SAST
Both zones in working hours (9am-5pm)
One zone working
Off-hours
Columns are hours of the day in London (GMT). Each row shows the local working-hours state in that zone for the same moment in time.
7 hours of overlap during standard 9am-5pm working hours.
Best meeting window: 09:00–15:00 GMT (10:00–16:00 SAST).

Hour-by-hour GMT to SAST conversion table

GMT time (London)SAST time (Johannesburg)Status
00:00 Sun01:00 SunOff-hours both sides
01:00 Sun02:00 SunOff-hours both sides
02:00 Sun03:00 SunOff-hours both sides
03:00 Sun04:00 SunOff-hours both sides
04:00 Sun05:00 SunOff-hours both sides
05:00 Sun06:00 SunOff-hours both sides
06:00 Sun07:00 SunOff-hours both sides
07:00 Sun08:00 SunOff-hours both sides
08:00 Sun09:00 SunSAST working
09:00 Sun10:00 SunBoth at work
10:00 Sun11:00 SunBoth at work
11:00 Sun12:00 SunBoth at work
12:00 Sun13:00 SunBoth at work
13:00 Sun14:00 SunBoth at work
14:00 Sun15:00 SunBoth at work
15:00 Sun16:00 SunBoth at work
16:00 Sun17:00 SunGMT working
17:00 Sun18:00 SunOff-hours both sides
18:00 Sun19:00 SunOff-hours both sides
19:00 Sun20:00 SunOff-hours both sides
20:00 Sun21:00 SunOff-hours both sides
21:00 Sun22:00 SunOff-hours both sides
22:00 Sun23:00 SunOff-hours both sides
23:00 Sun00:00 MonOff-hours both sides

Times computed for today in each zone using the IANA time zone database. The conversion accounts for daylight saving time wherever applicable.

About these time zones

Greenwich Mean Time (GMT)
IANA identifier
Europe/London
Current UTC offset
UTC+01:00
Current abbreviation
GMT+1
Major cities in this zone
LondonManchesterEdinburghBirmingham
South Africa Standard Time (SAST)
IANA identifier
Africa/Johannesburg
Current UTC offset
UTC+02:00
Current abbreviation
GMT+2
Major cities in this zone
JohannesburgCape TownDurban

Sun today in London and Johannesburg

London
Sunrise
05:18
Sunset
20:38
Solar noon
12:58
Daylight
15h 20m
Johannesburg
Sunrise
06:37
Sunset
17:33
Solar noon
12:05
Daylight
10h 56m

Related converters

SAST to GMT (reverse)GMT to ESTGMT to PSTGMT to UTCGMT to CETGMT to ISTEST to SASTPST to SASTUTC to SASTCET to SASTIST to SAST
Looking for local time? See time in London or time in Johannesburg.

Frequently asked questions

What is the time difference between GMT and SAST right now?+
SAST (South Africa Standard Time) is currently 1 hour ahead GMT (Greenwich Mean Time). The exact difference can change when one or both zones transition into or out of daylight saving time.
Does GMT or SAST observe daylight saving time?+
GMT: observes daylight saving time. SAST: does not observe daylight saving time.
When is the best time to schedule a meeting between GMT and SAST?+
The strongest overlap is 09:00–15:00 GMT (10:00–16:00 SAST), giving 7 hours when both sides are within standard 9am-5pm working hours.
What time is it in Johannesburg when it is 12:00 noon in London?+
When it is 12:00 Sun in London (GMT), it is 13:00 Sun in Johannesburg (SAST).
Which IANA time zone identifiers are used for GMT and SAST?+
GMT maps to "Europe/London" in the IANA database. SAST maps to "Africa/Johannesburg". These identifiers are what most software libraries use to convert times accurately, including DST handling.
Is London ahead of or behind Johannesburg?+
Whether London (GMT) is ahead of or behind Johannesburg (SAST) depends on the current UTC offsets. Right now SAST is 1 hour ahead GMT. The live converter and side-by-side clocks above always reflect the current direction.
What are the current UTC offsets for GMT and SAST?+
GMT is UTC+01:00 (GMT+1) and SAST is UTC+02:00 (GMT+2). Both offsets shift by one hour when the corresponding region enters or exits daylight saving time, so the live values on this page are the source of truth.
Can I schedule meetings during business hours for both GMT and SAST?+
Yes. There are 7 hours of overlap during standard 9am-5pm working hours, with the strongest window at 09:00–15:00 GMT.