Mumbai is 4½ hours ahead of London right now.
The gap between London and Mumbai is not fixed. It moves between 4½ hours and 5½ hours during the year, because the two cities change their clocks on different dates, or only one of them changes at all. The table gives exact dates for the rest of 2026 and for 2027.
Time difference by date
| Dates | Mumbai compared with London | Zones |
|---|---|---|
| Until 25 Oct 2026 | 4½ hours ahead | BST (UTC+1) / IST (UTC+5:30) |
| 25 Oct 2026 to 28 Mar 2027 | 5½ hours ahead | GMT (UTC+0) / IST (UTC+5:30) |
| 28 Mar 2027 to 31 Oct 2027 | 4½ hours ahead | BST (UTC+1) / IST (UTC+5:30) |
| From 31 Oct 2027 | 5½ hours ahead | GMT (UTC+0) / IST (UTC+5:30) |
Worked examples around the clock changes
The same local time in London lands at a different time in Mumbai either side of each change:
- London changes its clocks on Sunday 25 October 2026. Before the change, on Friday 23 October 2026, 09:00 in London is 13:30 in Mumbai (4½ hours ahead). After it, on Monday 26 October 2026, 09:00 in London is 14:30 in Mumbai (5½ hours ahead).
- London changes its clocks on Sunday 28 March 2027. Before the change, on Friday 26 March 2027, 09:00 in London is 14:30 in Mumbai (5½ hours ahead). After it, on Monday 29 March 2027, 09:00 in London is 13:30 in Mumbai (4½ hours ahead).
- London changes its clocks on Sunday 31 October 2027. Before the change, on Friday 29 October 2027, 09:00 in London is 13:30 in Mumbai (4½ hours ahead). After it, on Monday 1 November 2027, 09:00 in London is 14:30 in Mumbai (5½ hours ahead).
Working hours overlap
When the 09:00–17:00 working days in London and Mumbai overlap, on a mid-week day in each period:
- Until 25 Oct 2026: 09:00–12:30 in London = 13:30–17:00 in Mumbai (3.5 hours).
- 25 Oct 2026 to 28 Mar 2027: 09:00–11:30 in London = 14:30–17:00 in Mumbai (2.5 hours).
- 28 Mar 2027 to 31 Oct 2027: 09:00–12:30 in London = 13:30–17:00 in Mumbai (3.5 hours).
- From 31 Oct 2027: 09:00–11:30 in London = 14:30–17:00 in Mumbai (2.5 hours).