What is the time difference between London and Johannesburg?

Johannesburg (SAST, UTC+2) is 2 hours ahead of London in winter (GMT, UTC+0) and 1 hour ahead in summer (BST, UTC+1). South Africa does not observe Daylight Saving Time, so the offset changes only when the UK shifts its clocks in spring and autumn.

Does Johannesburg observe Daylight Saving Time?

No. South Africa abolished Daylight Saving Time in 1994 and has stayed on SAST (UTC+2) year-round ever since. Only London shifts its clocks, which is why the London-Johannesburg gap alternates between 2 and 1 hour.

When does the offset change from 2 to 1 hour?

The UK moves clocks forward on the last Sunday in March at 01:00 GMT, entering BST (UTC+1). At that point Johannesburg goes from 2 hours ahead to 1 hour ahead. The gap returns to 2 hours on the last Sunday in October at 02:00 BST when the UK reverts to GMT.

What are the best meeting times for London and Johannesburg?

In winter (GMT), a 09:00–17:00 London window corresponds to 11:00–19:00 in Johannesburg — solid overlap until late afternoon in South Africa. In summer (BST), a 09:00–18:00 London window corresponds to 10:00–19:00 Johannesburg. Mornings work well for both cities in both seasons.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

SAST stands for South Africa Standard Time. It is UTC+2, used across South Africa, including Johannesburg, Cape Town, and Durban, year-round. There is no South Africa Daylight Saving Time because the country does not observe DST.

Time Difference: London to Johannesburg

See the current time in London and Johannesburg side by side, with the live UTC offset (SAST is UTC+2, no DST), updated every second.

London, United Kingdom

--:--:--

GMT UTC+0

Johannesburg, South Africa

--:--:--

SAST UTC+2

Current Offset

+2 hours

Johannesburg is 2 hours ahead of London

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

London	Johannesburg	Status

Convert London Time to Johannesburg Time

Based on the current offset — updates automatically

London	Johannesburg

Summary

This tool displays the live current time in both London (Europe/London — GMT in winter, BST in summer) and Johannesburg (Africa/Johannesburg — SAST, UTC+2 year-round, no DST) side by side. Johannesburg never observes Daylight Saving Time, so the offset between the two cities changes twice a year: 2 hours ahead of London in winter (GMT) and 1 hour ahead in summer (BST). Use this tool to schedule calls with South Africa, coordinate remote teams, or plan travel between the UK and Johannesburg.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Europe/London time using the IANA timezone database built into modern browsers.
The same moment is converted to Africa/Johannesburg time (SAST, UTC+2).
The UTC offsets of both cities are compared to calculate the exact hour difference.
All three values — London time, Johannesburg time, and the offset — refresh every second.
When London switches between GMT and BST, the displayed offset adjusts automatically from +2 to +1 hour.

Use cases

Scheduling video calls between London and Johannesburg offices.
Checking if a colleague in Johannesburg is still at their desk.
Planning UK-South Africa travel and arrival time comparisons.
Remote teams coordinating daily standups across the UK and South Africa.
Finding overlapping business hours for London-Johannesburg meetings.
Verifying whether London is currently on GMT or BST.
Investors monitoring London and Johannesburg stock exchange hours.
Students and teachers arranging online lessons between the UK and South Africa.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu