Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

Mumbai to NST

-9h

Mumbai

ISTSOURCE

India · UTC+05:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

NST

UTC-02:30☀ DST active

HH03

MM00

03:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Mumbai

NST

12:00 AM

4:00 PM-1

2:00 AM

6:00 PM-1

4:00 AM

8:00 PM-1

6:00 AM

10:00 PM-1

8:00 AM

12:00 AM

10:00 AM

2:00 AM

12:00 PM

4:00 AM

2:00 PM

6:00 AM

4:00 PM

8:00 AM

6:00 PM

10:00 AM

8:00 PM

12:00 PM

10:00 PM

2:00 PM

Green rows indicate typical business hours (9 AM - 5 PM)

IST and NST on the World Map

The map below highlights the IST (India Standard Time) and NST (Newfoundland Standard Time) timezone regions across the globe.

IST Zone

→

NST Zone

Explore all world timezones interactively →

IST – India Standard Time

UTC+05:30

India Standard Time (IST) is the time zone for India and Sri Lanka, 5 hours and 30 minutes ahead of UTC.

Countries in IST

IndiaSri Lanka

Major Cities in IST

MumbaiDelhiBangaloreKolkataChennaiHyderabadPuneAhmedabadColomboJaipurLucknowSurat

Key Facts about IST

•India is 10 hours 30 minutes ahead of EST and 5 hours 30 minutes ahead of GMT.
•India uses a single time zone despite spanning 30° of longitude.
•IST is one of only a handful of time zones with a 30-minute offset.
•IST is the most populous single time zone in the world with over 1.4 billion people.
•The Bombay Stock Exchange (BSE) and National Stock Exchange (NSE) operate on IST.

Daylight Saving:No – UTC+05:30 year-round

Learn more about IST on Wikipedia

NST – Newfoundland Standard Time

UTC-03:30

Newfoundland Standard Time (NST) is a unique half-hour offset time zone in Canada, 3.5 hours behind UTC.

Countries in NST

Canada (Newfoundland)

Major Cities in NST

St. John'sCorner BrookMount Pearl

Key Facts about NST

•NST is one of only a few half-hour offset time zones in the world.
•Newfoundland joined Canada in 1949 and kept its unique time zone.
•St. John's is the easternmost city in North America.

Daylight Saving:Yes – switches to NDT

Learn more about NST on Wikipedia

About Mumbai

Wikipedia

Mumbai operates on India Standard Time (IST), UTC+5:30. As India's financial capital and home to BSE (Asia's oldest stock exchange), Mumbai timing is crucial for Asia markets.

Population:12.4 million

Metro:21.3 million

Business Hours:9:30 AM - 5:30 PM IST

Currency:INR (₹)

Stock Exchange:BSE (Bombay Stock Exchange), NSE

Key Landmarks

Gateway of IndiaChhatrapati Shivaji TerminusMarine DriveElephanta CavesHaji Ali Dargah

Did You Know?

The Mumbai local trains carry over 7.5 million passengers daily.

Learn more about IST timezone →

Understanding the -9h Gap: Mumbai vs NST

Mumbai runs on India Standard Time (IST) at UTC+05:30. NST runs on Newfoundland Standard Time (NST) at UTC-03:30. That puts Mumbai 9 hours behind NST — a difference of -9h at the current offsets.

In practice, when it is 9:00 AM in Mumbai it is 12:00 AM in NST. Midnight in Mumbai is 3:00 PM in NST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Mumbai to NST time conversion table

Mumbai (IST)	NST (NST)	Day
12:00 AM	3:00 PM	previous day
6:00 AM	9:00 PM	previous day
7:00 AM	10:00 PM	previous day
8:00 AM	11:00 PM	previous day
9:00 AM	12:00 AM	same day
12:00 PM	3:00 AM	same day
3:00 PM	6:00 AM	same day
5:00 PM	8:00 AM	same day
6:00 PM	9:00 AM	same day
9:00 PM	12:00 PM	same day

Why people convert Mumbai to NST time

Scheduling a call from Mumbai to NST: a 10:00 AM start in Mumbai lands at 1:00 AM in NST, so you can confirm the slot without doing the arithmetic yourself.
Handling a -9h gap: Mumbai and NST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in NST is 12:00 AM in Mumbai.
Booking travel or deliveries: tracking NST local time against Mumbai keeps pickup windows and arrival estimates honest across the -9h offset.

Always state the zone abbreviation, not just the hour. "3:00 PM IST" is unambiguous; "3 PM" across a -9h gap is not.
With a -9h gap there is no shared 9-to-5 window, so alternate the early start: one week Mumbai takes the early slot, the next week NST does.

About IST (India Standard Time)

India Standard Time (IST) is the time observed throughout India and Sri Lanka. It is based on the 82.5°E meridian, passing through Mirzapur in Uttar Pradesh. India uses a single time zone despite spanning roughly 30° of longitude, which has been debated. IST does not observe daylight saving time. India is the world's most populous country, making IST one of the most-used time zones globally. The IT outsourcing industry and call centers operate primarily on IST, making the EST-to-IST conversion one of the most searched timezone conversions.

About NST (Newfoundland Standard Time)

Newfoundland Standard Time (NST) is one of the few half-hour offset time zones in the world. It covers the island of Newfoundland in Canada and is 30 minutes ahead of Atlantic Standard Time. This unique offset exists because Newfoundland was an independent country until 1949.

Best time to call between Mumbai and NST

With a -9h offset there is no overlap inside a normal 9 AM – 5 PM day. NST opens at 9:00 AM NST, which is 12:00 AM in Mumbai, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

Mumbai and NST have no shared working hours because of the -9h gap. Teams need to alternate early starts or rely on asynchronous handovers.

Mumbai is 9 hours behind NST (IST UTC+05:30 → NST UTC-03:30). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Mumbai

Does not observe DST

NST

☀ Currently in DST

Standard: UTC-03:30 · DST: UTC-02:30

Clocks fall back on Sun, Nov 1, 2026

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between Mumbai and NST?

Mumbai (IST, UTC+05:30) is 9 hours behind NST (NST, UTC-03:30). The gap is currently -9h.

How do I convert Mumbai time to NST time?

Add -9h to Mumbai local time. For example, 9:00 AM in Mumbai is 12:00 AM in NST.

What time is it in NST right now?

NST uses NST at UTC-03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -9h offset from Mumbai.

What is the best time to call NST from Mumbai?

There is no shared working-hours window because of the -9h gap. The closest option is 1:00 PM in Mumbai, which is 4:00 AM in NST.

Which is behind, Mumbai or NST?

Mumbai is 9 hours behind NST. When it is 12:00 PM in Mumbai it is 3:00 AM in NST.

Do Mumbai and NST use different time zones?

Mumbai (India) uses IST at UTC+05:30, while NST uses NST at UTC-03:30. The IANA identifiers are Asia/Kolkata and America/St_Johns.

Does daylight saving time affect the Mumbai–NST difference?

Neither zone observes daylight saving time, so the -9h offset between Mumbai and NST is fixed all year.

Which other cities share Mumbai's time zone?

IST also covers Mumbai, Delhi, Bangalore, Kolkata, Chennai, Hyderabad, Pune, Ahmedabad and 4 more.

Which countries use IST, Mumbai's zone?

IST is used in India, Sri Lanka.

Is there a day difference between Mumbai and NST?

Not normally. The -9h gap only pushes the date over the previous day.

What is the time difference between Mumbai and NST?

NST is -9h from Mumbai.

What timezone is Mumbai in?

Mumbai operates on India Standard Time (IST), UTC+5:30. As India's financial capital and home to BSE (Asia's oldest stock exchange), Mumbai timing is crucial for Asia markets.