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Hours Apart

London to Mumbai

These two are not a fixed distance apart. The gap is +4h30, +5h30 at different points in the year, and it changes 3 times.

Reading your clock…

Every gap between London and Mumbai, with dates

This is the table other converters do not show. Each row is a stretch of the year during which the difference is a particular number. Dates are London's local dates.

Time difference between London and Mumbai by date range
FromUntilMumbai isLength
Tuesday, 1 September 2026Saturday, 24 October 20264 hours 30 minutes ahead54 days
Sunday, 25 October 2026Saturday, 27 March 20275 hours 30 minutes ahead154 days
Sunday, 28 March 2027Saturday, 30 October 20274 hours 30 minutes ahead217 days
Sunday, 31 October 2027onwards5 hours 30 minutes ahead—

The highlighted row is the one to watch. For 154 days from Sunday, 25 October 2026, the difference is 5 hours 30 minutes ahead rather than the usual figure. A weekly call booked outside that window arrives an hour off inside it.

London hours converted to Mumbai

As at Monday, 14 September 2026. Use the converter above for any other day — and if the table of gaps says the difference changes, these numbers change with it.

Hourly conversion from London to Mumbai
LondonMumbai
07:0011:30
08:0012:30
09:0013:30
10:0014:30
11:0015:30
12:0016:30
13:0017:30
14:0018:30
15:0019:30
16:0020:30
17:0021:30
18:0022:30
19:0023:30
20:0000:30next day

London

Europe/London

Changes clocks twice a year, between UTC+00:00 and UTC+01:00. Next change Sunday, 25 October 2026.

Mumbai

Asia/Kolkata

Never changes clocks. Fixed at UTC+05:30 all year.

When London and Mumbai can actually talk

On a standard 09:00–17:00 day in both cities, the working hours overlap for 3.5 hours. That window is 09:00–12:30 in London, which is 13:30–17:00 in Mumbai.

That is tight. A recurring call here has very little slack, so a daylight saving shift at either end can wipe the window out entirely.

Calculated for Monday, 14 September 2026. Because the gap changes during the year, this window moves with it — the planner recomputes it for any date you pick.

Put both on a world clockFind a meeting time for both

Questions

London and Mumbai, explained

What is the time difference between London and Mumbai?

There is no single answer, which is why most converters get this wrong for part of the year. Mumbai is 4 hours 30 minutes ahead, 5 hours 30 minutes ahead relative to London at different points in the year. Right now it is 4 hours 30 minutes ahead. The table on this page gives the exact dates for each.

Why does the difference between London and Mumbai change?

London moves between UTC+00:00 and UTC+01:00, while Mumbai stays on UTC+05:30 all year. A gap only stays fixed when both ends are fixed. Here one end moves, so the difference moves with it even though nothing changed at the other end.

When is the difference between London and Mumbai unusual?

The shortest window runs from Sunday, 25 October 2026 to Saturday, 27 March 2027 — 154 days during which Mumbai is 5 hours 30 minutes ahead relative to London rather than the usual amount. Short windows like this are where recurring meetings break, because nobody thinks to check.

Does this account for daylight saving automatically?

Yes. Offsets come from your device's own copy of the IANA time zone database through the browser's Intl API, so they reflect whatever rules are current rather than a table bundled here that could go stale. Pick any date in the converter and it resolves that date's rules, not today's.