Time Difference Between Mumbai and New York

India's clock sits half an hour off the hour, and that is the first thing this corridor teaches you. New York runs 9h 30m behind Mumbai for most of the year, so every invitation lands on the half hour and somebody always sets the alarm wrong. The workable band is narrow. New York's 8:30 to 10:30 in the morning is 6 to 8 in the Mumbai evening, and that is where the calls end up. Mumbai does the compromising. A 9 AM start in Mumbai is 11:30 the previous night in New York, so the friendlier arrangement only exists if the New York side agrees to a 7 AM call, which buys Mumbai a reasonable 4:30 in the afternoon.

Mumbai keeps the same clock all year, so every bit of seasonal movement here comes from New York. The gap is 9h 30m from Mar 8 to Oct 31 and 10h 30m from Nov 1 through Mar 7. A recurring call pinned to 9:30 in the New York morning sits at 7 PM in Mumbai during October and at 8 PM from Nov 1, and nobody edits the invite because nothing about the invite changed. The reference clock moved underneath it. Decide early which city's clock owns a standing meeting, then let the other side watch it drift twice a year.

Nonstop flights between Mumbai and New York sit somewhere around fifteen hours, a little longer westbound against the wind than on the return. Westbound is the easier direction. You land in New York in the afternoon, stay outside until dark, and most people sleep that night. Going home is the expensive leg. You arrive in Mumbai in the small hours owing your body most of a night, and the 9h 30m you gained on the way over gets collected back with interest. Frequent flyers on this route write off the day after an eastbound landing instead of pretending they can work through it.