Mumbai is 4 hours 30 minutes to 5 hours 30 minutes ahead of London, depending on the time of year. If you are both awake 7 am to 11 pm, a January weekday gives you 10.5 hours awake at the same time, and 0.5 hours of those are outside a 9-to-5 for both of you (in July: 11.5 hours shared, 1.5 hours free). Here are the good ones.
Mumbai is 5 hours 30 minutes ahead of London that week. On a weekday you are both awake for 10.5 hours, and 0.5 hours of those are outside work for both of you.
Worked out for the week of 11 January 2027 (11 Jan – 17 Jan), in London time, with each zone’s own daylight-saving rules for those dates. Mumbai awake 7 am – 11 pm, working 9 am – 5 pm weekdays; London awake 7 am – 11 pm, working 9 am – 5 pm weekdays.
A weekday, in London timeboth awake
Londonawake 7 am – 11 pm
Mumbaiawake 7 am – 5:30 pm and 1:30 – 7 am London time
7a10a1p4p7p10p1a4a7a
Best on a weekday
noon – 2 pm London
5:30 – 7:30 pm Mumbai · London lunchtime, Mumbai early evening · during London’s lunch break
Another weekday option
7 – 9 am London
12:30 – 2:30 pm Mumbai · London morning, Mumbai lunchtime · during Mumbai’s work hours
The long weekend call
Sat 12:30 – 3:30 pm London
Sat 6 – 9 pm Mumbai · London lunchtime, Mumbai early evening
The week · London time, 11 Jan – 17 Jan
7a
8a
9a
10a
11a
12p
1p
2p
3p
4p
5p
6p
7p
8p
9p
10p
Mon
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Tue
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Wed
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Thu
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Fri
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Sat
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Sun
12:30p
1:30p
2:30p
3:30p
4:30p
5:30p
6:30p
7:30p
8:30p
9:30p
10:30p
11:30p
12:30a
1:30a
2:30a
3:30a
Columns are London hours; the small figure in each cell is the time in Mumbai. both freeboth awake, one at workMumbai asleep
The Mumbai–London gap through 2027
Dates
Difference
1 January – 27 March
Mumbai is 5 hours 30 minutes ahead of London
28 March – 30 October
Mumbai is 4 hours 30 minutes ahead of London
31 October – 31 December
Mumbai is 5 hours 30 minutes ahead of London
The week grid and call windows were worked out for 11 Jan to 17 Jan 2027 with the IANA time-zone rules for Asia/Kolkata (Mumbai) and Europe/London (London). That week London is on standard time and Mumbai keeps the same time all year. The table uses the same rules for every day of 2027. The finder above recalculates for the current week in your browser.
When it is … in London
In London
Mumbai, January
Mumbai, July
7 am
12:30 pm
11:30 am
9 am
2:30 pm
1:30 pm
11 am
4:30 pm
3:30 pm
1 pm
6:30 pm
5:30 pm
3 pm
8:30 pm
7:30 pm
5 pm
10:30 pm
9:30 pm
7 pm
12:30 am (next day)
11:30 pm
9 pm
2:30 am (next day)
1:30 am (next day)
Wednesday times. Send times as “your 8 pm” or “my 8 pm” so nobody has to guess whose clock you mean.
Stop doing the math every day
The Long Goodbye keeps your person’s local time and time of day on your home-screen widget and lock screen, so you can see whether it is morning coffee or midnight in Mumbai before you call. A “thinking of you” tap lights up their widget, and a countdown keeps the next visit in view.
What is the time difference between Mumbai and London?
Mumbai is 4 hours 30 minutes to 5 hours 30 minutes ahead of London, depending on the time of year. In 2027 it is 5 hours 30 minutes from 1 January to 27 March and from 31 October to 31 December; 4 hours 30 minutes from 28 March to 30 October.
What is the best time to call Mumbai from London?
In January, the easiest two hours on a weekday are noon – 2 pm London, which is 5:30 – 7:30 pm Mumbai: London lunchtime, Mumbai early evening, during London’s lunch break. At the weekend, Sat 12:30 – 3:30 pm London (Sat 6 – 9 pm Mumbai) gives you a longer call. Change the awake and work hours in the finder on this page to fit your own days.
How many waking hours do Mumbai and London share?
If both of you are awake from 7 am to 11 pm, you share 10.5 hours on a January weekday, and 0.5 hours of them fall outside 9-to-5 working hours in both places; in July it is 11.5 hours shared and 1.5 hours free.
Does daylight saving time change the call times?
Yes. In 2027 London changes its clocks on 28 March and 31 October and Mumbai does not change its clocks, so a call you keep at the same time in London moves by an hour in Mumbai on those dates. Check the table on this page and agree the new time out loud after each change.