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).

Warsaw to Colombo

+3h 30m

Warsaw

CESTSOURCE

Poland · UTC+02:00☀ DST active

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Colombo

IST

Sri Lanka · UTC+05:30

HH03

MM30

15:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

Warsaw

Colombo

12:00 AM

3:30 AM

2:00 AM

5:30 AM

4:00 AM

7:30 AM

6:00 AM

9:30 AM

8:00 AM

11:30 AM

10:00 AM

1:30 PM

12:00 PM

3:30 PM

2:00 PM

5:30 PM

4:00 PM

7:30 PM

6:00 PM

9:30 PM

8:00 PM

11:30 PM

10:00 PM

1:30 AM+1

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

CEST and IST on the World Map

The map below highlights the CEST (Central European Time) and IST (India Standard Time) timezone regions across the globe.

CEST Zone

→

IST Zone

Explore all world timezones interactively →

CET – Central European Time

UTC+01:00

Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.

Countries in CET

GermanyFranceItalySpainNetherlandsBelgiumAustriaSwitzerlandPolandCzech RepublicSwedenNorwayDenmarkHungaryCroatiaSerbiaSlovakiaSloveniaBosnia and HerzegovinaNorth MacedoniaAlbaniaMontenegroLuxembourgMaltaTunisiaAlgeriaNigeria

Major Cities in CET

ParisBerlinRomeMadridAmsterdamBrusselsViennaWarsawZurichStockholmOsloCopenhagenPragueBudapestBarcelonaMunichMilanLagos

Key Facts about CET

•CET covers more European countries than any other time zone.
•Spain uses CET despite being geographically aligned with GMT/WET.
•The Frankfurt Stock Exchange, Euronext (Amsterdam/Paris), and Borsa Italiana operate on CET.
•Over 500 million people live in the CET time zone.
•France moved to CET during the German occupation in WWII and never switched back.

Daylight Saving:Yes – switches to CEST

Learn more about CET 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 Warsaw

Wikipedia

Warsaw operates on Central European Time (CET/CEST). As Central Europe's financial hub, Warsaw's GPW is the largest stock exchange in the region.

Population:1.8 million

Metro:3.1 million

Business Hours:8:00 AM - 5:00 PM CET

Currency:PLN (zł)

Stock Exchange:GPW (Warsaw Stock Exchange)

Key Landmarks

Old TownRoyal CastlePalace of CultureŁazienki ParkPOLIN Museum

Did You Know?

Poland has one of the fastest-growing tech sectors in Europe.

Learn more about CEST timezone →

About Colombo

Wikipedia

Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.

Population:752,000

Metro:5.6 million

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

Currency:LKR (Rs)

Stock Exchange:CSE (Colombo Stock Exchange)

Key Landmarks

Galle Face GreenGangaramaya TempleColombo Lotus TowerIndependence SquareDutch Hospital

Did You Know?

Sri Lanka Standard Time (SLST) uses UTC+5:30, same offset as India.

Learn more about IST timezone →

Understanding the +3h 30m Gap: Warsaw vs Colombo

Warsaw runs on Central European Summer Time (CEST) at UTC+02:00, currently observing daylight saving time. Colombo runs on India Standard Time (IST) at UTC+05:30. That puts Warsaw 3 hours 30 minutes ahead of Colombo — a difference of +3h 30m at the current offsets.

In practice, when it is 9:00 AM in Warsaw it is 12:30 PM in Colombo. Midnight in Warsaw is 3:30 AM in Colombo.Warsaw observes daylight saving time while Colombo does not, so the gap narrows or widens by an hour part of the year.

Warsaw to Colombo time conversion table

Warsaw (CEST)	Colombo (IST)	Day
12:00 AM	3:30 AM	same day
6:00 AM	9:30 AM	same day
7:00 AM	10:30 AM	same day
8:00 AM	11:30 AM	same day
9:00 AM	12:30 PM	same day
12:00 PM	3:30 PM	same day
3:00 PM	6:30 PM	same day
5:00 PM	8:30 PM	same day
6:00 PM	9:30 PM	same day
9:00 PM	12:30 AM	next day

Why people convert Warsaw to Colombo time

Scheduling a call from Warsaw to Colombo: a 10:00 AM start in Warsaw lands at 1:30 PM in Colombo, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Warsaw and Colombo are inside the 9-to-5 working day between 9:00 AM and 1:30 PM CEST time (12:30 PM–5:00 PM IST). That is roughly 4 hours 30 minutes of usable overlap.
Watching a live event or market open: Warsaw viewers need 12:30 PM in Colombo to catch a 9:00 AM start there, and 8:30 PM if the event is anchored to Warsaw.

Always state the zone abbreviation, not just the hour. "3:00 PM CEST" is unambiguous; "3 PM" across a +3h 30m gap is not.
Block 9:00 AM–1:30 PM CEST as the recurring meeting window if you work primarily from Warsaw and need Colombo colleagues present.
Warsaw: Clocks fall back on Sun, Oct 25, 2026. Re-check this page after that date because the offset changes and so does the +3h 30m gap.

About CET (Central European Time)

Central European Time (CET) is the standard time zone for most of Europe, covering over 30 countries from Spain to Poland, and from Norway to Italy. CET is 1 hour ahead of GMT and is used by the European Union's most populous nations. During summer, most CET countries switch to Central European Summer Time (CEST, UTC+02:00). Major European financial markets in Frankfurt, Paris, and Amsterdam operate on CET.

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 Warsaw and Colombo

Both Warsaw and Colombo sit inside the 9 AM – 5 PM working day between 9:00 AM–1:30 PM CEST, which is 12:30 PM–5:00 PM IST. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

Warsaw and Colombo overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.

Warsaw is 3 hours 30 minutes ahead of Colombo (CEST UTC+02:00 → IST UTC+05:30). The shared working window is 9:00 AM–1:30 PM CEST. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

Warsaw

☀ Currently in DST

Standard: UTC+01:00 · DST: UTC+02:00

Clocks fall back on Sun, Oct 25, 2026

Colombo

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 Warsaw and Colombo?

Warsaw (CEST, UTC+02:00) is 3 hours 30 minutes ahead of Colombo (IST, UTC+05:30). The gap is currently +3h 30m.

How do I convert Warsaw time to Colombo time?

Add +3h 30m to Warsaw local time. For example, 9:00 AM in Warsaw is 12:30 PM in Colombo.

What time is it in Colombo right now?

Colombo 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 +3h 30m offset from Warsaw.

What is the best time to call Colombo from Warsaw?

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

Which is ahead, Warsaw or Colombo?

Warsaw is 3 hours 30 minutes ahead of Colombo. When it is 12:00 PM in Warsaw it is 3:30 PM in Colombo.

Do Warsaw and Colombo use different time zones?

Warsaw (Poland) uses CEST at UTC+02:00, while Colombo (Sri Lanka) uses IST at UTC+05:30. The IANA identifiers are Europe/Warsaw and Asia/Colombo.

Does daylight saving time affect the Warsaw–Colombo difference?

Yes at the moment: Warsaw is on daylight saving time and Colombo is not, so the +3h 30m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share Warsaw's time zone?

CEST also covers Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw and 10 more.

Which countries use CEST, Warsaw's zone?

CEST is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 19 more.

Is there a day difference between Warsaw and Colombo?

Not normally. The +3h 30m gap only pushes the date over for late-evening times.

What is the time difference between Warsaw and Colombo?

Colombo is +3h 30m from Warsaw.

What timezone is Warsaw in?

Warsaw operates on Central European Time (CET/CEST). As Central Europe's financial hub, Warsaw's GPW is the largest stock exchange in the region.

What timezone is Colombo in?

Colombo operates on Sri Lanka Time (SLST), UTC+5:30. Sharing India's timezone, Colombo is a key South Asian trade and tourism hub.

What are the business hours in Warsaw?

Standard business hours in Warsaw are 8:00 AM - 5:00 PM CET.

What are the business hours in Colombo?

Standard business hours in Colombo are 9:00 AM - 5:00 PM IST.

What is the best time to schedule a call between Warsaw and Colombo?

The best overlap for a call is when both cities are in business hours. Warsaw works 8:00 AM - 5:00 PM CET and Colombo works 9:00 AM - 5:00 PM IST (+3h 30m difference). Try scheduling during the overlapping window for maximum convenience.

What currencies are used in Warsaw and Colombo?

Warsaw uses PLN (zł) while Colombo uses LKR (Rs). Check current exchange rates when planning travel or business between these cities.

How do Warsaw and Colombo compare in size?

Warsaw has a population of approximately 1.8 million (metro: 3.1 million), while Colombo has approximately 752,000 (metro: 5.6 million).

What are the major landmarks in Warsaw and Colombo?

Warsaw is known for Old Town, Royal Castle, Palace of Culture. Colombo is famous for Galle Face Green, Gangaramaya Temple, Colombo Lotus Tower.

Do Warsaw and Colombo have stock exchanges?

Yes. Warsaw has the GPW (Warsaw Stock Exchange) and Colombo has the CSE (Colombo Stock Exchange). The +3h 30m time difference affects trading hour overlaps between these exchanges.