Warsaw to London
-1hWarsaw
CETSOURCELondon
GMTGreen rows indicate typical business hours (9 AM - 5 PM)
CET and GMT on the World Map
The map below highlights the CET (Central European Time) and GMT (Greenwich Mean Time) timezone regions across the globe.
CET – Central European Time
UTC+01:00Central European Time (CET) is used across most of Western and Central Europe, 1 hour ahead of UTC.
- •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.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
- •The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
- •GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
- •Iceland uses GMT year-round and never observes daylight saving time.
- •The UK switches from GMT to BST (British Summer Time) in late March each year.
About Warsaw
WikipediaWarsaw operates on Central European Time (CET/CEST). As Central Europe's financial hub, Warsaw's GPW is the largest stock exchange in the region.
Warsaw's Old Town was completely rebuilt after World War II and is a UNESCO World Heritage Site.
About London
WikipediaLondon, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
Greenwich Mean Time (GMT) is defined by the Prime Meridian at the Royal Observatory in Greenwich, London.
Everything You Need to Know About Warsaw and London Time
Warsaw, Poland operates on the Central European Time (UTC+01:00). London, UK uses Greenwich Mean Time (UTC+00:00).
The time difference between Warsaw and London is 60 minutes (+1h). When it's noon in Warsaw, it's 11:00 AM in London.
Why Convert Warsaw to London Time?
Whether you're traveling from Warsaw to London or simply need to coordinate across time zones, understanding the 1-hour difference is key. Use this converter to quickly determine the current time in London and ensure your schedule aligns perfectly.
Pro Tip: If you frequently communicate with people in London from Warsaw, consider adding a dual-clock widget to your phone or computer to keep track of the 1-hour difference at a glance.
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 GMT (Greenwich Mean Time)
Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.
Best Time to Call Between Warsaw and London
If you want to reach someone in London during standard business hours (9 AM – 5 PM GMT), the best time to call from Warsaw would be:
- London 9:00 AM = Warsaw 10:00 AM
- London 12:00 PM = Warsaw 01:00 PM
- London 5:00 PM = Warsaw 06:00 PM
Business Hours Overlap
Warsaw and London have a significant business hours overlap (7 hours), making real-time collaboration easy during standard working hours.
As a final note, managing the -1h difference between Warsaw and London is simple with the right tools. Keep this page handy for all your future time conversion needs.
🕐 Daylight Saving Time Info
Warsaw
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
Clocks fall back on Sun, Oct 25, 2026
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between Warsaw and London?
London is -1h 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 London in?
London, where Greenwich Mean Time (GMT) originates, is the world's leading financial center alongside New York. The city bridges European and American business hours.
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 London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What is the best time to schedule a call between Warsaw and London?
The best overlap for a call is when both cities are in business hours. Warsaw works 8:00 AM - 5:00 PM CET and London works 9:00 AM - 5:00 PM GMT (-1h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in Warsaw and London?
Warsaw uses PLN (zł) while London uses GBP (£). Check current exchange rates when planning travel or business between these cities.
How do Warsaw and London compare in size?
Warsaw has a population of approximately 1.8 million (metro: 3.1 million), while London has approximately 8.8 million (metro: 14.8 million).
What are the major landmarks in Warsaw and London?
Warsaw is known for Old Town, Royal Castle, Palace of Culture. London is famous for Big Ben, Tower Bridge, Buckingham Palace.
Do Warsaw and London have stock exchanges?
Yes. Warsaw has the GPW (Warsaw Stock Exchange) and London has the LSE (London Stock Exchange). The -1h time difference affects trading hour overlaps between these exchanges.
Which countries use CET (Central European Time)?
CET is used in Germany, France, Italy, Spain, Netherlands, Belgium, and 21 more countries.
Does CET observe daylight saving time?
Yes, CET switches to CEST during summer months.
What are some interesting facts about CET?
CET covers more European countries than any other time zone. Spain uses CET despite being geographically aligned with GMT/WET.
Which cities are in the GMT timezone?
Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.
What is the UTC offset for GMT?
Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.
What should I know about the GMT timezone?
GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
When is it midnight in Warsaw, what time is it in London?
When it is 12:00 AM (midnight) in Warsaw (CET), it is -1h later in London (GMT).
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