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).

Kathmandu to Sydney

+4h 15m

Kathmandu

NPTSOURCE

Nepal · UTC+05:45

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Sydney

AEST

Australia · UTC+10:00DST observed

HH04

MM15

16:15 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Kathmandu

Sydney

12:00 AM

4:15 AM

2:00 AM

6:15 AM

4:00 AM

8:15 AM

6:00 AM

10:15 AM

8:00 AM

12:15 PM

10:00 AM

2:15 PM

12:00 PM

4:15 PM

2:00 PM

6:15 PM

4:00 PM

8:15 PM

6:00 PM

10:15 PM

8:00 PM

12:15 AM+1

10:00 PM

2:15 AM+1

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

NPT and AEST on the World Map

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

NPT Zone

→

AEST Zone

Explore all world timezones interactively →

NPT – Nepal Time

UTC+05:45

Nepal Time (NPT, UTC+05:45) is the time zone for Nepal — one of the few offsets in the world set on a 45-minute increment.

Countries in NPT

Nepal

Major Cities in NPT

KathmanduPokharaLalitpurBharatpurBiratnagar

Key Facts about NPT

•Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour.
•The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
•Nepal does not observe daylight saving time.
•Nepal is 15 minutes ahead of India, despite sharing a long open border.

Daylight Saving:No – UTC+05:45 year-round

Learn more about NPT on Wikipedia

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

About Kathmandu

Wikipedia

Kathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.

Population:1.4 million

Metro:3.0 million

Business Hours:10:00 AM - 5:00 PM NPT

Currency:NPR (रू)

Stock Exchange:NEPSE (Nepal Stock Exchange)

Key Landmarks

Boudhanath StupaSwayambhunathDurbar SquarePashupatinath TempleGarden of Dreams

Did You Know?

Nepal Time (NPT) is one of only three timezones offset by 45 minutes (UTC+5:45).

Learn more about NPT timezone →

About Sydney

Wikipedia

Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.

Population:5.4 million

Metro:5.4 million

Business Hours:9:00 AM - 5:00 PM AEST

Currency:AUD (A$)

Stock Exchange:ASX (Australian Securities Exchange)

Key Landmarks

Sydney Opera HouseSydney Harbour BridgeBondi BeachDarling HarbourRoyal Botanic Garden

Did You Know?

Sydney is one of the first major cities to welcome the New Year.

Learn more about AEST timezone →

Everything You Need to Know About Kathmandu and Sydney Time

Kathmandu runs on Nepal Time (NPT) at UTC+05:45. Sydney runs on Australian Eastern Standard Time (AEST) at UTC+10:00. That puts Kathmandu 4 hours 15 minutes ahead of Sydney — a difference of +4h 15m at the current offsets.

In practice, when it is 9:00 AM in Kathmandu it is 1:15 PM in Sydney. Midnight in Kathmandu is 4:15 AM in Sydney. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Kathmandu to Sydney time conversion table

Kathmandu (NPT)	Sydney (AEST)	Day
12:00 AM	4:15 AM	same day
6:00 AM	10:15 AM	same day
7:00 AM	11:15 AM	same day
8:00 AM	12:15 PM	same day
9:00 AM	1:15 PM	same day
12:00 PM	4:15 PM	same day
3:00 PM	7:15 PM	same day
5:00 PM	9:15 PM	same day
6:00 PM	10:15 PM	same day
9:00 PM	1:15 AM	next day

Why people convert Kathmandu to Sydney time

Scheduling a call from Kathmandu to Sydney: a 10:00 AM start in Kathmandu lands at 2:15 PM in Sydney, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Kathmandu and Sydney are inside the 9-to-5 working day between 9:00 AM and 12:45 PM NPT time (1:15 PM–5:00 PM AEST). That is roughly 3 hours 45 minutes of usable overlap.
Coordinating a Kathmandu-based team with Sydney contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM NPT" is unambiguous; "3 PM" across a +4h 15m gap is not.
Block 9:00 AM–12:45 PM NPT as the recurring meeting window if you work primarily from Kathmandu and need Sydney colleagues present.
Sydney: Clocks spring forward on Sat, Oct 3, 2026. Any meeting series spanning that date will shift by an hour in local time.

About NPT (Nepal Time)

Nepal Time (NPT) runs at UTC+05:45, one of only a handful of time zones worldwide that are not a whole or half hour from UTC. Nepal set its offset to 5 hours 45 minutes ahead of UTC in 1986 to mark the country's position between the 75°E and 90°E meridians; Kathmandu's solar time sits just over 5 hours 41 minutes ahead of Greenwich, so the 45-minute offset tracks the sun more closely than either 5:30 or 6:00 would. Nepal does not observe daylight saving time, so NPT is fixed all year. The offset makes Nepal 15 minutes ahead of India Standard Time (UTC+05:30) and 2 hours 15 minutes ahead of Dubai (UTC+04:00).

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.

Best time to call between Kathmandu and Sydney

Both Kathmandu and Sydney sit inside the 9 AM – 5 PM working day between 9:00 AM–12:45 PM NPT, which is 1:15 PM–5:00 PM AEST. That gives roughly 3 hours and 45 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

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

Kathmandu is 4 hours 15 minutes ahead of Sydney (NPT UTC+05:45 → AEST UTC+10:00). The shared working window is 9:00 AM–12:45 PM NPT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Kathmandu

Does not observe DST

Sydney

❄ Currently in Standard Time

Standard: UTC+10:00 · DST: UTC+11:00

Clocks spring forward on Sat, Oct 3, 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 Kathmandu and Sydney?

Kathmandu (NPT, UTC+05:45) is 4 hours 15 minutes ahead of Sydney (AEST, UTC+10:00). The gap is currently +4h 15m.

How do I convert Kathmandu time to Sydney time?

Add +4h 15m to Kathmandu local time. For example, 9:00 AM in Kathmandu is 1:15 PM in Sydney.

What time is it in Sydney right now?

Sydney uses AEST at UTC+10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h 15m offset from Kathmandu.

What is the best time to call Sydney from Kathmandu?

Call between 9:00 AM and 12:45 PM NPT — that maps to 1:15 PM–5:00 PM AEST and keeps both parties inside the working day.

Which is ahead, Kathmandu or Sydney?

Kathmandu is 4 hours 15 minutes ahead of Sydney. When it is 12:00 PM in Kathmandu it is 4:15 PM in Sydney.

Do Kathmandu and Sydney use different time zones?

Kathmandu (Nepal) uses NPT at UTC+05:45, while Sydney (Australia) uses AEST at UTC+10:00. The IANA identifiers are Asia/Kathmandu and Australia/Sydney.

Does daylight saving time affect the Kathmandu–Sydney difference?

Neither zone observes daylight saving time, so the +4h 15m offset between Kathmandu and Sydney is fixed all year.

Which other cities share Kathmandu's time zone?

NPT also covers Kathmandu, Pokhara, Lalitpur, Bharatpur, Biratnagar.

Which countries use NPT, Kathmandu's zone?

NPT is used in Nepal.

Is there a day difference between Kathmandu and Sydney?

Not normally. The +4h 15m gap only pushes the date over for late-evening times.

What is the time difference between Kathmandu and Sydney?

Sydney is +4h 15m from Kathmandu.

What timezone is Kathmandu in?

Kathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.

What timezone is Sydney in?

Sydney operates on Australian Eastern Standard Time (AEST/AEDT). As Australia's financial capital, Sydney opens global markets at the start of the business day.

What are the business hours in Kathmandu?

Standard business hours in Kathmandu are 10:00 AM - 5:00 PM NPT.

What are the business hours in Sydney?

Standard business hours in Sydney are 9:00 AM - 5:00 PM AEST.

What is the best time to schedule a call between Kathmandu and Sydney?

The best overlap for a call is when both cities are in business hours. Kathmandu works 10:00 AM - 5:00 PM NPT and Sydney works 9:00 AM - 5:00 PM AEST (+4h 15m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Kathmandu and Sydney?

Kathmandu uses NPR (रू) while Sydney uses AUD (A$). Check current exchange rates when planning travel or business between these cities.

How do Kathmandu and Sydney compare in size?

Kathmandu has a population of approximately 1.4 million (metro: 3.0 million), while Sydney has approximately 5.4 million (metro: 5.4 million).

What are the major landmarks in Kathmandu and Sydney?

Kathmandu is known for Boudhanath Stupa, Swayambhunath, Durbar Square. Sydney is famous for Sydney Opera House, Sydney Harbour Bridge, Bondi Beach.

Do Kathmandu and Sydney have stock exchanges?

Yes. Kathmandu has the NEPSE (Nepal Stock Exchange) and Sydney has the ASX (Australian Securities Exchange). The +4h 15m time difference affects trading hour overlaps between these exchanges.