There is no overlap between 09:00–18:00 working days in these two places.
Clock changes in Boston and Mumbai
Boston
Eastern Daylight Time (EDT)
Next clock change Sun 1 Nov 2026 (UTC−4 → UTC−5)
Mumbai
India Standard Time (IST)
No daylight saving time.
Time difference between Boston and Mumbai today
Today Mumbai is 9.5 hours ahead of Boston. When it is 09:00 in Boston, it is 18:30 in Mumbai. Boston is on Eastern Daylight Time (EDT); Mumbai is on India Standard Time (IST).
When the Boston to Mumbai time difference changes
For most of the year Mumbai is 9.5 hours ahead of Boston. From 1 November to 31 December 2026, Mumbai is 10.5 hours ahead of Boston instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
Mumbai vs Boston
Length
8 March 2026 to 31 October 2026
9.5 hours ahead
238 days
1 November 2026 to 31 December 2026
10.5 hours ahead
61 days
1 January 2027 to 13 March 2027
10.5 hours ahead
72 days
14 March 2027 to 6 November 2027
9.5 hours ahead
238 days
7 November 2027 to 31 December 2027
10.5 hours ahead
55 days
Calling hours for Boston and Mumbai
When Mumbai is 9.5 hours ahead of Boston: no shared 09:00 to 17:00 hours; try 08:00 in Boston (17:30 in Mumbai).
When Mumbai is 10.5 hours ahead of Boston: no shared 09:00 to 17:00 hours; try 07:00 in Boston (17:30 in Mumbai).
Frequently asked questions about Boston and Mumbai time
What time is it in Mumbai when it is 9:00 AM in Boston?
18:30 today; Mumbai is 9.5 hours ahead of Boston.
Does the time difference between Boston and Mumbai change?
Yes. It is usually 9.5 hours ahead, but changes when one side moves its clocks: 10.5 hours ahead from 1 November to 31 December 2026; 10.5 hours ahead from 1 January to 13 March 2027.