What UTC offset does Mumbai use?

Mumbai uses India Standard Time (IST), which is UTC+5:30 year-round. India does not observe daylight saving time and uses a single time zone for the entire country despite spanning a geographic breadth that would normally warrant two or three zones. The half-hour offset (5:30 rather than a whole number) surprises many schedulers.

What are typical business hours in Mumbai?

Standard business hours in Mumbai run 9 AM to 6 PM IST, Monday through Friday, with some firms also working a half-day on Saturday. Indian technology and BPO companies often work shifts aligned to US or European business hours, meaning actual hours vary significantly by industry. Lunch is typically between 1 and 2 PM.

What is the best time to schedule a call between Mumbai and New York?

Mumbai (IST, UTC+5:30) is 10.5 hours ahead of New York (EST) in winter. The most workable arrangement is an early morning New York call (7:30–9 AM EST) that lands in Mumbai at 6–7:30 PM IST — end-of-business for India. Alternatively, a 9 PM EST call is 7:30 AM IST the next morning, which suits Mumbai better.

Working Hours in Mumbai: A Timezone Guide

February 17, 2026

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Frequently Asked Questions

What UTC offset does Mumbai use?: Mumbai uses India Standard Time (IST), which is UTC+5:30 year-round. India does not observe daylight saving time and uses a single time zone for the entire country despite spanning a geographic breadth that would normally warrant two or three zones. The half-hour offset (5:30 rather than a whole number) surprises many schedulers.
What are typical business hours in Mumbai?: Standard business hours in Mumbai run 9 AM to 6 PM IST, Monday through Friday, with some firms also working a half-day on Saturday. Indian technology and BPO companies often work shifts aligned to US or European business hours, meaning actual hours vary significantly by industry. Lunch is typically between 1 and 2 PM.
What is the best time to schedule a call between Mumbai and New York?: Mumbai (IST, UTC+5:30) is 10.5 hours ahead of New York (EST) in winter. The most workable arrangement is an early morning New York call (7:30–9 AM EST) that lands in Mumbai at 6–7:30 PM IST — end-of-business for India. Alternatively, a 9 PM EST call is 7:30 AM IST the next morning, which suits Mumbai better.