CET to GMT
-1hCET
CETSOURCEGMT
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.
Time Conversion Guide: CET to GMT
CET runs on Central European Time (CET) at UTC+01:00. GMT runs on Greenwich Mean Time (GMT) at UTC+00:00. That puts CET 1 hour behind GMT — a difference of -1h at the current offsets.
In practice, when it is 9:00 AM in CET it is 8:00 AM in GMT. Midnight in CET is 11:00 PM in GMT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
CET to GMT time conversion table
| CET (CET) | GMT (GMT) | Day |
|---|---|---|
| 12:00 AM | 11:00 PM | previous day |
| 6:00 AM | 5:00 AM | same day |
| 7:00 AM | 6:00 AM | same day |
| 8:00 AM | 7:00 AM | same day |
| 9:00 AM | 8:00 AM | same day |
| 12:00 PM | 11:00 AM | same day |
| 3:00 PM | 2:00 PM | same day |
| 5:00 PM | 4:00 PM | same day |
| 6:00 PM | 5:00 PM | same day |
| 9:00 PM | 8:00 PM | same day |
Why people convert CET to GMT time
- Scheduling a call from CET to GMT: a 10:00 AM start in CET lands at 9:00 AM in GMT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both CET and GMT are inside the 9-to-5 working day between 10:00 AM and 5:00 PM CET time (9:00 AM–4:00 PM GMT). That is roughly 7 hours of usable overlap.
- Watching a live event or market open: CET viewers need 8:00 AM in GMT to catch a 9:00 AM start there, and 1:00 AM if the event is anchored to CET.
- Always state the zone abbreviation, not just the hour. "3:00 PM CET" is unambiguous; "3 PM" across a -1h gap is not.
- Block 10:00 AM–5:00 PM CET as the recurring meeting window if you work primarily from CET and need GMT colleagues present.
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 CET and GMT
Both CET and GMT sit inside the 9 AM – 5 PM working day between 10:00 AM–5:00 PM CET, which is 9:00 AM–4:00 PM GMT. That gives roughly 7 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
CET and GMT share 7 hours of working-hours overlap (10:00 AM–5:00 PM CET), so scheduling a live meeting is straightforward.
CET is 1 hour behind GMT (CET UTC+01:00 → GMT UTC+00:00). The shared working window is 10:00 AM–5:00 PM CET. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
CET
☀ Currently in DST
Standard: UTC+01:00 · DST: UTC+02:00
Clocks fall back on Sun, Oct 25, 2026
GMT
☀ 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 CET and GMT?
CET (CET, UTC+01:00) is 1 hour behind GMT (GMT, UTC+00:00). The gap is currently -1h.
How do I convert CET time to GMT time?
Add -1h to CET local time. For example, 9:00 AM in CET is 8:00 AM in GMT.
What time is it in GMT right now?
GMT uses GMT at UTC+00:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -1h offset from CET.
What is the best time to call GMT from CET?
Call between 10:00 AM and 5:00 PM CET — that maps to 9:00 AM–4:00 PM GMT and keeps both parties inside the working day.
Which is behind, CET or GMT?
CET is 1 hour behind GMT. When it is 12:00 PM in CET it is 11:00 AM in GMT.
Does daylight saving time affect the CET–GMT difference?
Neither zone observes daylight saving time, so the -1h offset between CET and GMT is fixed all year.
Which other cities share CET's time zone?
CET also covers Paris, Berlin, Rome, Madrid, Amsterdam, Brussels, Vienna, Warsaw and 10 more.
Which countries use CET, CET's zone?
CET is used in Germany, France, Italy, Spain, Netherlands, Belgium, Austria, Switzerland and 19 more.
Is there a day difference between CET and GMT?
Not normally. The -1h gap only pushes the date over the previous day.
What is the time difference between CET and GMT?
GMT is -1h from CET.
What timezone is CET in?
CET operates on its local timezone.
What timezone is GMT in?
GMT operates on its local timezone.
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 CET, what time is it in GMT?
When it is 12:00 AM (midnight) in CET (CET), it is -1h later in GMT (GMT).
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