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).

Istanbul to Kathmandu

+2h 45m

Istanbul

TRTSOURCE

Turkey · UTC+03:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Kathmandu

NPT

Nepal · UTC+05:45

HH02

MM45

14:45 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Istanbul

Kathmandu

12:00 AM

2:45 AM

2:00 AM

4:45 AM

4:00 AM

6:45 AM

6:00 AM

8:45 AM

8:00 AM

10:45 AM

10:00 AM

12:45 PM

12:00 PM

2:45 PM

2:00 PM

4:45 PM

4:00 PM

6:45 PM

6:00 PM

8:45 PM

8:00 PM

10:45 PM

10:00 PM

12:45 AM+1

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

TRT and NPT on the World Map

The map below highlights the TRT (Turkey Time) and NPT (Nepal Time) timezone regions across the globe.

TRT Zone

→

NPT Zone

Explore all world timezones interactively →

TRT – Turkey Time

UTC+03:00

Turkey Time (TRT, UTC+03:00) is the single time zone used across Turkey, fixed year round since 2016.

Countries in TRT

Turkey

Major Cities in TRT

IstanbulAnkaraIzmirBursaAntalya

Key Facts about TRT

•Turkey has used a permanent UTC+03:00 since September 2016.
•TRT is level with Moscow Standard Time and Arabia Standard Time all year.
•Because Turkey kept summer time permanently, western cities see very late winter sunrises.
•Turkey previously observed daylight saving time from 1973 to 2016.

Daylight Saving:No – UTC+03:00 year-round

Learn more about TRT on Wikipedia

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

About Istanbul

Wikipedia

Istanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.

Population:15.5 million

Metro:15.8 million

Business Hours:9:00 AM - 6:00 PM TRT

Currency:TRY (₺)

Stock Exchange:Borsa Istanbul

Key Landmarks

Hagia SophiaBlue MosqueTopkapi PalaceGrand BazaarGalata Tower

Did You Know?

The Grand Bazaar is one of the world's oldest and largest covered markets with 4,000+ shops.

Learn more about TRT timezone →

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 →

Istanbul to Kathmandu Time Difference – Complete Guide

Istanbul runs on Türkiye Standard Time (TRT) at UTC+03:00. Kathmandu runs on Nepal Time (NPT) at UTC+05:45. That puts Istanbul 2 hours 45 minutes ahead of Kathmandu — a difference of +2h 45m at the current offsets.

In practice, when it is 9:00 AM in Istanbul it is 11:45 AM in Kathmandu. Midnight in Istanbul is 2:45 AM in Kathmandu. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Istanbul to Kathmandu time conversion table

Istanbul (TRT)	Kathmandu (NPT)	Day
12:00 AM	2:45 AM	same day
6:00 AM	8:45 AM	same day
7:00 AM	9:45 AM	same day
8:00 AM	10:45 AM	same day
9:00 AM	11:45 AM	same day
12:00 PM	2:45 PM	same day
3:00 PM	5:45 PM	same day
5:00 PM	7:45 PM	same day
6:00 PM	8:45 PM	same day
9:00 PM	11:45 PM	same day

Why people convert Istanbul to Kathmandu time

Scheduling a call from Istanbul to Kathmandu: a 10:00 AM start in Istanbul lands at 12:45 PM in Kathmandu, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Istanbul and Kathmandu are inside the 9-to-5 working day between 9:00 AM and 2:15 PM TRT time (11:45 AM–5:00 PM NPT). That is roughly 5 hours 15 minutes of usable overlap.
Coordinating a Istanbul-based team with Kathmandu 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 TRT" is unambiguous; "3 PM" across a +2h 45m gap is not.
Block 9:00 AM–2:15 PM TRT as the recurring meeting window if you work primarily from Istanbul and need Kathmandu colleagues present.

About TRT (Turkey Time)

Turkey Time (TRT) is fixed at UTC+03:00 all year. Turkey abolished seasonal clock changes in September 2016, moving to a permanent UTC+03:00 so the whole country stays on what was formerly summer time. That leaves Istanbul, which sits close to 29°E, on an offset well ahead of its solar time — sunrise in mid-winter comes after 08:30 local. TRT shares its offset with Moscow Standard Time, Arabia Standard Time and East Africa Time, so Istanbul is level with Moscow and Riyadh all year and one hour ahead of Central European Time during the European winter.

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).

Best time to call between Istanbul and Kathmandu

Both Istanbul and Kathmandu sit inside the 9 AM – 5 PM working day between 9:00 AM–2:15 PM TRT, which is 11:45 AM–5:00 PM NPT. That gives roughly 5 hours and 15 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Istanbul and Kathmandu share 5 hours of working-hours overlap (9:00 AM–2:15 PM TRT), so scheduling a live meeting is straightforward.

Istanbul is 2 hours 45 minutes ahead of Kathmandu (TRT UTC+03:00 → NPT UTC+05:45). The shared working window is 9:00 AM–2:15 PM TRT. Remember to re-check around daylight-saving transitions.

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 Istanbul and Kathmandu?

Istanbul (TRT, UTC+03:00) is 2 hours 45 minutes ahead of Kathmandu (NPT, UTC+05:45). The gap is currently +2h 45m.

How do I convert Istanbul time to Kathmandu time?

Add +2h 45m to Istanbul local time. For example, 9:00 AM in Istanbul is 11:45 AM in Kathmandu.

What time is it in Kathmandu right now?

Kathmandu uses NPT at UTC+05:45. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 45m offset from Istanbul.

What is the best time to call Kathmandu from Istanbul?

Call between 9:00 AM and 2:15 PM TRT — that maps to 11:45 AM–5:00 PM NPT and keeps both parties inside the working day.

Which is ahead, Istanbul or Kathmandu?

Istanbul is 2 hours 45 minutes ahead of Kathmandu. When it is 12:00 PM in Istanbul it is 2:45 PM in Kathmandu.

Do Istanbul and Kathmandu use different time zones?

Istanbul (Turkey) uses TRT at UTC+03:00, while Kathmandu (Nepal) uses NPT at UTC+05:45. The IANA identifiers are Europe/Istanbul and Asia/Kathmandu.

Does daylight saving time affect the Istanbul–Kathmandu difference?

Neither zone observes daylight saving time, so the +2h 45m offset between Istanbul and Kathmandu is fixed all year.

Which other cities share Istanbul's time zone?

TRT also covers Istanbul, Ankara, Izmir, Bursa, Antalya.

Which countries use TRT, Istanbul's zone?

TRT is used in Turkey.

Is there a day difference between Istanbul and Kathmandu?

Not normally. The +2h 45m gap only pushes the date over for late-evening times.

What is the time difference between Istanbul and Kathmandu?

Kathmandu is +2h 45m from Istanbul.

What timezone is Istanbul in?

Istanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.

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 are the business hours in Istanbul?

Standard business hours in Istanbul are 9:00 AM - 6:00 PM TRT.

What are the business hours in Kathmandu?

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

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

The best overlap for a call is when both cities are in business hours. Istanbul works 9:00 AM - 6:00 PM TRT and Kathmandu works 10:00 AM - 5:00 PM NPT (+2h 45m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Istanbul and Kathmandu?

Istanbul uses TRY (₺) while Kathmandu uses NPR (रू). Check current exchange rates when planning travel or business between these cities.

How do Istanbul and Kathmandu compare in size?

Istanbul has a population of approximately 15.5 million (metro: 15.8 million), while Kathmandu has approximately 1.4 million (metro: 3.0 million).

What are the major landmarks in Istanbul and Kathmandu?

Istanbul is known for Hagia Sophia, Blue Mosque, Topkapi Palace. Kathmandu is famous for Boudhanath Stupa, Swayambhunath, Durbar Square.

Do Istanbul and Kathmandu have stock exchanges?

Yes. Istanbul has the Borsa Istanbul and Kathmandu has the NEPSE (Nepal Stock Exchange). The +2h 45m time difference affects trading hour overlaps between these exchanges.