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).

AEST to Mumbai

-4h 30m

AEST

AESTSOURCE

UTC+10:00DST observed

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Mumbai

IST

India · UTC+05:30

HH07

MM30

07:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

AEST

Mumbai

12:00 AM

7:30 PM-1

2:00 AM

9:30 PM-1

4:00 AM

11:30 PM-1

6:00 AM

1:30 AM

8:00 AM

3:30 AM

10:00 AM

5:30 AM

12:00 PM

7:30 AM

2:00 PM

9:30 AM

4:00 PM

11:30 AM

6:00 PM

1:30 PM

8:00 PM

3:30 PM

10:00 PM

5:30 PM

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

AEST and IST on the World Map

The map below highlights the AEST (Australian Eastern Standard Time) and IST (India Standard Time) timezone regions across the globe.

AEST Zone

→

IST Zone

Explore all world timezones interactively →

AEST – Australian Eastern Standard Time

UTC+10:00

Australian Eastern Standard Time (AEST) covers eastern Australia, 10 hours ahead of UTC.

Countries in AEST

Australia (NSW, VIC, QLD, TAS, ACT)Papua New Guinea

Major Cities in AEST

SydneyMelbourneBrisbaneCanberraHobartGold Coast

Key Facts about AEST

•Queensland does not observe daylight saving time, staying on AEST year-round.
•Sydney and Melbourne switch to AEDT (UTC+11:00) in summer.
•The Australian Securities Exchange (ASX) operates on AEST/AEDT.
•AEST is 15 hours ahead of EST during winter.

Daylight Saving:Yes – switches to AEDT

Learn more about AEST on Wikipedia

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

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 -4h 30m Gap: AEST vs Mumbai

AEST runs on Australian Eastern Standard Time (AEST) at UTC+10:00. Mumbai runs on India Standard Time (IST) at UTC+05:30. That puts AEST 4 hours 30 minutes behind Mumbai — a difference of -4h 30m at the current offsets.

In practice, when it is 9:00 AM in AEST it is 4:30 AM in Mumbai. Midnight in AEST is 7:30 PM in Mumbai. Neither zone observes daylight saving time, so the offset between them stays constant all year.

AEST to Mumbai time conversion table

AEST (AEST)	Mumbai (IST)	Day
12:00 AM	7:30 PM	previous day
6:00 AM	1:30 AM	same day
7:00 AM	2:30 AM	same day
8:00 AM	3:30 AM	same day
9:00 AM	4:30 AM	same day
12:00 PM	7:30 AM	same day
3:00 PM	10:30 AM	same day
5:00 PM	12:30 PM	same day
6:00 PM	1:30 PM	same day
9:00 PM	4:30 PM	same day

Why people convert AEST to Mumbai time

Scheduling a call from AEST to Mumbai: a 10:00 AM start in AEST lands at 5:30 AM in Mumbai, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both AEST and Mumbai are inside the 9-to-5 working day between 1:30 PM and 5:00 PM AEST time (9:00 AM–12:30 PM IST). That is roughly 3 hours 30 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in AEST is 3:30 PM in Mumbai makes it easy to avoid calling at 3 AM.

Always state the zone abbreviation, not just the hour. "3:00 PM AEST" is unambiguous; "3 PM" across a -4h 30m gap is not.
Block 1:30 PM–5:00 PM AEST as the recurring meeting window if you work primarily from AEST and need Mumbai colleagues present.

About AEST (Australian Eastern Standard Time)

Australian Eastern Standard Time (AEST) is used in the eastern states of Australia including New South Wales, Victoria, Queensland, Tasmania, and the ACT. During summer (October to April), NSW, VIC, TAS, and ACT switch to Australian Eastern Daylight Time (AEDT, UTC+11:00), while Queensland remains on AEST year-round.

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.

Best time to call between AEST and Mumbai

Both AEST and Mumbai sit inside the 9 AM – 5 PM working day between 1:30 PM–5:00 PM AEST, which is 9:00 AM–12:30 PM IST. That gives roughly 3 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

AEST and Mumbai overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

AEST is 4 hours 30 minutes behind Mumbai (AEST UTC+10:00 → IST UTC+05:30). The shared working window is 1:30 PM–5:00 PM AEST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

AEST

❄ Currently in Standard Time

Standard: UTC+10:00 · DST: UTC+11:00

Clocks spring forward on Sat, Oct 3, 2026

Mumbai

Does not observe DST

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 AEST and Mumbai?

AEST (AEST, UTC+10:00) is 4 hours 30 minutes behind Mumbai (IST, UTC+05:30). The gap is currently -4h 30m.

How do I convert AEST time to Mumbai time?

Add -4h 30m to AEST local time. For example, 9:00 AM in AEST is 4:30 AM in Mumbai.

What time is it in Mumbai right now?

Mumbai uses IST at UTC+05:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 30m offset from AEST.

What is the best time to call Mumbai from AEST?

Call between 1:30 PM and 5:00 PM AEST — that maps to 9:00 AM–12:30 PM IST and keeps both parties inside the working day.

Which is behind, AEST or Mumbai?

AEST is 4 hours 30 minutes behind Mumbai. When it is 12:00 PM in AEST it is 7:30 AM in Mumbai.

Do AEST and Mumbai use different time zones?

AEST uses AEST at UTC+10:00, while Mumbai (India) uses IST at UTC+05:30. The IANA identifiers are Australia/Sydney and Asia/Kolkata.

Does daylight saving time affect the AEST–Mumbai difference?

Neither zone observes daylight saving time, so the -4h 30m offset between AEST and Mumbai is fixed all year.

Which other cities share AEST's time zone?

AEST also covers Sydney, Melbourne, Brisbane, Canberra, Hobart, Gold Coast.

Which countries use AEST, AEST's zone?

AEST is used in Australia (NSW, VIC, QLD, TAS, ACT), Papua New Guinea.

Is there a day difference between AEST and Mumbai?

Not normally. The -4h 30m gap only pushes the date over the previous day.

What is the time difference between AEST and Mumbai?

Mumbai is -4h 30m from AEST.

What timezone is AEST in?

AEST operates on its local timezone.

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.