London to Warsaw
+1hLondon
GMTSOURCEWarsaw
CETGreen rows indicate typical business hours (9 AM - 5 PM)
GMT and CET on the World Map
The map below highlights the GMT (Greenwich Mean Time) and CET (Central European Time) timezone regions across the globe.
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.
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.
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.
London was the first city to have an underground railway, opening in 1863.
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.
Poland has one of the fastest-growing tech sectors in Europe.
London to Warsaw Time Difference – Complete Guide
London, UK operates on the Greenwich Mean Time (UTC+00:00). Warsaw, Poland uses Central European Time (UTC+01:00).
The time difference between London and Warsaw is 60 minutes (+1h). When it's noon in London, it's 01:00 PM in Warsaw.
Why Convert London to Warsaw Time?
The time difference of 1 hours between London and Warsaw can significantly impact business operations and personal communication. By using this converter, you can easily find the overlapping business hours and schedule your interactions when both parties are available.
Best Practice: When proposing meeting times to someone in Warsaw, offer a few options in their local time to show consideration for the 1-hour difference.
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.
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.
Best Time to Call Between London and Warsaw
If you want to reach someone in Warsaw during standard business hours (9 AM – 5 PM CET), the best time to call from London would be:
- Warsaw 9:00 AM = London 08:00 AM
- Warsaw 12:00 PM = London 11:00 AM
- Warsaw 5:00 PM = London 04:00 PM
Business Hours Overlap
London and Warsaw have a significant business hours overlap (7 hours), making real-time collaboration easy during standard working hours.
In conclusion, the +1h time shift from London to Warsaw doesn't have to be a hurdle. With our interactive converter, you can easily find the perfect time to connect.
🕐 Daylight Saving Time Info
London
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Warsaw
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
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 London and Warsaw?
Warsaw is +1h from London.
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 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 are the business hours in London?
Standard business hours in London are 9:00 AM - 5:00 PM GMT.
What are the business hours in Warsaw?
Standard business hours in Warsaw are 8:00 AM - 5:00 PM CET.
What is the best time to schedule a call between London and Warsaw?
The best overlap for a call is when both cities are in business hours. London works 9:00 AM - 5:00 PM GMT and Warsaw works 8:00 AM - 5:00 PM CET (+1h difference). Try scheduling during the overlapping window for maximum convenience.
What currencies are used in London and Warsaw?
London uses GBP (£) while Warsaw uses PLN (zł). Check current exchange rates when planning travel or business between these cities.
How do London and Warsaw compare in size?
London has a population of approximately 8.8 million (metro: 14.8 million), while Warsaw has approximately 1.8 million (metro: 3.1 million).
What are the major landmarks in London and Warsaw?
London is known for Big Ben, Tower Bridge, Buckingham Palace. Warsaw is famous for Old Town, Royal Castle, Palace of Culture.
Do London and Warsaw have stock exchanges?
Yes. London has the LSE (London Stock Exchange) and Warsaw has the GPW (Warsaw Stock Exchange). The +1h time difference affects trading hour overlaps between these exchanges.
Which countries use GMT (Greenwich Mean Time)?
GMT is used in United Kingdom, Ireland, Iceland, Portugal (mainland), Ghana, Senegal, and 9 more countries.
Does GMT observe daylight saving time?
Yes, GMT switches to BST during summer months.
What are some interesting facts about GMT?
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.
Which cities are in the CET timezone?
Major cities in the CET timezone include Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw.
What is the UTC offset for CET?
Central European Time (CET) is at UTC+01:00. During daylight saving time, it shifts to CEST.
What should I know about the CET timezone?
CET covers more European countries than any other time zone. Spain uses CET despite being geographically aligned with GMT/WET.
When is it midnight in London, what time is it in Warsaw?
When it is 12:00 AM (midnight) in London (GMT), it is +1h later in Warsaw (CET).
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