Convert UTC to CET Coordinated Universal Time ↔ Central European Time Free Online Secure
Type a time in UTC and read it in CET straight away. The offset is +1 h, the arithmetic wraps at midnight, and the answer says which day it lands on.
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Through the day — Convert UTC to CET (Coordinated Universal Time ↔ Central European Time)
| UTC | CET |
|---|---|
| 00:00 | 01:00 |
| 03:00 | 04:00 |
| 06:00 | 07:00 |
| 09:00 | 10:00 |
| 12:00 | 13:00 |
| 15:00 | 16:00 |
| 18:00 | 19:00 |
| 21:00 | 22:00 |
Where these units come from
Until the middle of the nineteenth century every town kept its own noon, set by the sun overhead, and nobody minded that the next town was four minutes behind. Railways ended that: a timetable cannot be written for a hundred local noons. Britain put its railways on Greenwich time in 1847, and in 1884 the International Meridian Conference in Washington chose Greenwich as the prime meridian and sketched the twenty-four-hour scheme we still use. Greenwich Mean Time was the world's reference until 1972, when Coordinated Universal Time replaced it: UTC is kept by atomic clocks and tied back to the turning Earth by leap seconds. The abbreviations on this page name standard time — the winter setting — which is why each one is a fixed number of hours rather than something that drifts through the year.
Where you meet them
A time zone becomes real the moment two people in different places have to agree on one moment: a call between offices, a flight that lands before it took off, a market that opens while you are asleep, a deadline written in somebody else's afternoon. Server logs, train and flight schedules and anything stamped with a time are kept in UTC precisely so that the question can always be settled, no matter whose clock was on the wall.
Questions people ask
What about summer time?
The offsets here are standard-time offsets, the ones a zone keeps in winter. Where summer time is observed, the same places move one hour further on for part of the year and take a different name: Central European Time becomes Central European Summer Time, Eastern Standard Time becomes Eastern Daylight Time. The switching dates are not the same in every country, and the two hemispheres change in opposite months, so for a date inside a summer-time period add an hour to whichever side observes it.
Why isn't every difference a whole number of hours?
Because offsets are decided by governments, not by geometry. India is half an hour off the hour, at UTC+05:30; Nepal is three quarters, at UTC+05:45; the Chatham Islands are at UTC+12:45. Any of these can be changed by law, and several countries have moved their offset within living memory.
Is the answer exact?
Where both units are defined in terms of one another by whole numbers, yes — the page says so above the figure, and the only rounding is in how many digits are shown. Where the ratio has no finite decimal, the page shows twelve significant digits and says the relation is approximate rather than pretending otherwise.
Does anything I type leave my device?
No. The arithmetic runs in your browser; nothing is uploaded and there is no server to upload it to. Load the page once and it keeps working with the network switched off.
UTC readings for continental Europe
Machines in Europe keep their records in UTC, while the people who use them in Berlin, Paris, Rome, Madrid, Warsaw or Zurich read the wall clock. If a log line says 08:20 UTC and the support desk in Munich wants to know when that was for them, they need to convert UTC to CET. In winter you add one hour: 08:20 UTC is 09:20 CET, 11:00 UTC is 12:00 CET, and 23:30 UTC is 00:30 CET on the following date. Only the last hour of the UTC day moves into the next date on the continent.
The sections below set out the rule, give two tables, describe both zones and explain why the offset becomes two hours in summer. They also work through technical cases: cloud regions, data-breach deadlines, electricity auctions, air traffic, space launches and rail booking systems. The calculation takes place in your browser, and nothing you type is sent to a server.
How to convert UTC to CET
Add one hour
CET is UTC+1, so the continent is one hour ahead. Add one to the UTC hour each time you convert UTC to CET. If the total reaches 24:00, subtract 24 and advance the date. 23:10 UTC is 00:10 CET on the next date.
Eight readings
00:30 UTC is 01:30 CET. 06:15 UTC is 07:15 CET. 09:00 UTC is 10:00 CET. 12:00 UTC is 13:00 CET. 15:45 UTC is 16:45 CET. 18:00 UTC is 19:00 CET. 21:30 UTC is 22:30 CET. 23:45 UTC is 00:45 CET the next day. Only the last row changes the date.
With the offset attached
The instant 2026-01-14T10:00:00Z is the same as 2026-01-14T11:00:00+01:00. A program that reads the second form recovers the instant without any rule for European summer time, because the offset has been included.
UTC in European systems
The shared reference
Civil aviation, power grids, banks and data centres in Europe use UTC as their common language. It has no summer time and belongs to no country, so logs and contracts that cross borders prefer it to local clocks.
Why systems store it
Local times misbehave at the clock change. On 29 March 2026 the hour from 02:00 to 03:00 does not exist in Central Europe, and on 25 October the hour from 02:00 to 03:00 occurs twice. UTC has neither problem.
Central European Time
Countries and cities
CET, UTC+1, is the winter time of Germany, France, Italy, mainland Spain, Poland, the Netherlands, Belgium, Luxembourg, Switzerland, Austria, Czechia, Slovakia, Hungary, Slovenia, Croatia, Serbia, Norway, Sweden and Denmark. It is also the clock of the European institutions in Brussels and Strasbourg.
The summer form
From the last Sunday in March to the last Sunday in October these countries use Central European Summer Time, CEST, at UTC+2. In 2026 that means 29 March to 25 October. In summer, 11:00 UTC is 13:00 CEST.
Where Romania stands
Romania, Bulgaria, Greece and Finland use Eastern European Time, one hour ahead of CET. From UTC, add two hours for Bucharest in winter.
One hour in day-to-day operations
Nearly identical working days
A Berlin office open from 09:00 to 17:00 CET works from 08:00 to 16:00 UTC. A London office open from 09:00 to 17:00 GMT works from 09:00 to 17:00 UTC. The two overlap from 09:00 to 16:00 UTC. That is why the exchanges in Frankfurt and London open at the same UTC hour, 08:00 in winter, and why a request to convert UTC to CET for them gives matching answers.
Maintenance windows
A window from 01:00 to 03:00 UTC falls between 02:00 and 04:00 CET, in the middle of the night. In summer the same window falls between 03:00 and 05:00 CEST, closer to the first early shifts. Plan it with the season in mind.
Daily reports
A report that closes at 00:00 UTC covers, for Berlin, the period from 01:00 CET one day to 01:00 CET the next. Sales made just after midnight local time appear in the previous day’s UTC report.
Why summer adds a second hour
The European calendar
The European Union fixes the change of time for all members: the last Sunday of March and the last Sunday of October, at 01:00 UTC in each case. In 2026 these are 29 March and 25 October. Between them Central Europe is on CEST, UTC+2, and 11:00 UTC is 13:00 CEST rather than 12:00 CET.
Effect on schedules
A task set for 07:00 UTC starts at 08:00 CET in winter and 09:00 CEST in summer. A team that wants it to start at 08:00 local time all year must change the UTC hour in March and October.
What the calculator does
The form above adds one hour, the winter figure. For a date between 29 March and 25 October, add two and label the result CEST. The relation to UTC is exact in both cases.
The cloud region in Frankfurt
Logs in UTC, users in CET
Cloud regions in Germany serve thousands of European companies. Their logs are in UTC, but the support teams work on CET. An incident that begins at 08:20 UTC is reported by users at 09:20 CET. Whoever analyses the cause must convert UTC to CET for every log line, otherwise the order of events looks wrong.
Scheduled jobs
A backup scheduled as “0 2 * * *” runs at 02:00 UTC, which is 03:00 CET in winter and 04:00 CEST in summer. If the working day starts at 07:00, the backup finishes before anyone arrives.
The 72-hour data-breach clock
How the hours are counted
European data protection law requires notification of a breach within 72 hours of becoming aware of it. If a breach is discovered at 14:30 CET, which is 13:30 UTC, the deadline falls at 13:30 UTC three days later, which is 14:30 CET, provided no clock change intervenes.
The trap at the clock change
If the 72 hours include the night of 29 March, the wall clock jumps forward by an hour, but the real elapsed time remains 72 hours. Counting in UTC avoids any argument about whether the deadline was met.
The day-ahead electricity auction
The closing time
The European day-ahead power auction closes at 12:00 Central European time. In winter, that is 11:00 UTC, and in summer 10:00 UTC. Results follow at about 12:45 on the same clock. Traders from across Europe work to these hours whatever their own zone.
For a participant in Bucharest
The 12:00 closing is 13:00 on a Bucharest wall clock all year, since both zones move together. A quick convert UTC to CET before bidding tells you how many minutes remain.
Research facilities near Geneva
Shifts and seminars
Large research installations near Geneva run around the clock. A shift change at 08:00 CET is at 07:00 UTC. A seminar at 16:00 CET starts at 15:00 UTC, which is 10:00 in New York. Technical documents give UTC so that collaborators on other continents read the same figure.
Avoiding a mix-up
A mistake of one hour can move a seminar outside the window that suits the Pacific coast. When you convert UTC to CET for a multi-site meeting, write both times in the invitation.
Air traffic control and flight plans
Zulu times
Flight plans in Europe are filed in UTC. A departure at 0830Z leaves at 08:30 UTC, which is 09:30 CET. An arrival at 1215Z is at 13:15 CET. Passengers see the local time on their tickets, not the Zulu time.
Departure slots
When air traffic management allocates a take-off slot, such as 0825Z to 0840Z, the aircraft must leave within those fifteen minutes. In summer the same slot is between 10:25 and 10:40 in Rome. A mistake of an hour can cost hours of delay.
Launches from French Guiana
Three clocks for one rocket
European rockets lift off from the space centre in French Guiana, which keeps UTC−3. A launch at 19:00 local time is at 22:00 UTC and 23:00 CET. The flight control team in Toulouse and the customer in Munich follow the same countdown, each on a different wall clock.
Planning to watch
Spectators in Europe watch the transmission in the late evening. If you check the time of the launch with a “convert UTC to CET” calculation, you can be sure that it is 23:00 CET, and not 22:00 or 00:00.
Rail booking systems
Local timetables, universal back ends
Rail operators publish their timetables in local time, but the booking systems that sell tickets across borders run on UTC. A train that leaves at 08:02 CET leaves at 07:02 UTC. A reservation made at 23:30 UTC for a 07:02 CET train the next day appears in the database under the previous date.
Traveller apps
Journey planners convert times to the phone’s time zone. If the phone is still on home time in Bucharest, a departure from Vienna at 14:10 CET appears as 15:10.
Every hour in one table
UTC to CET
00:00 UTC = 01:00 CET. 01:00 UTC = 02:00 CET. 02:00 UTC = 03:00 CET. 03:00 UTC = 04:00 CET. 04:00 UTC = 05:00 CET. 05:00 UTC = 06:00 CET. 06:00 UTC = 07:00 CET. 07:00 UTC = 08:00 CET. 08:00 UTC = 09:00 CET. 09:00 UTC = 10:00 CET. 10:00 UTC = 11:00 CET. 11:00 UTC = 12:00 CET. 12:00 UTC = 13:00 CET. 13:00 UTC = 14:00 CET. 14:00 UTC = 15:00 CET. 15:00 UTC = 16:00 CET. 16:00 UTC = 17:00 CET. 17:00 UTC = 18:00 CET. 18:00 UTC = 19:00 CET. 19:00 UTC = 20:00 CET. 20:00 UTC = 21:00 CET. 21:00 UTC = 22:00 CET. 22:00 UTC = 23:00 CET. 23:00 UTC = 00:00 CET (next day).
How to read it
Each row pairs a UTC hour with the matching continental hour and says when the date changes. The rows follow the one-hour addition that applies when you convert UTC to CET.
Half-hour marks
UTC to CET at :30
00:30 UTC = 01:30 CET. 01:30 UTC = 02:30 CET. 02:30 UTC = 03:30 CET. 03:30 UTC = 04:30 CET. 04:30 UTC = 05:30 CET. 05:30 UTC = 06:30 CET. 06:30 UTC = 07:30 CET. 07:30 UTC = 08:30 CET. 08:30 UTC = 09:30 CET. 09:30 UTC = 10:30 CET. 10:30 UTC = 11:30 CET. 11:30 UTC = 12:30 CET. 12:30 UTC = 13:30 CET. 13:30 UTC = 14:30 CET. 14:30 UTC = 15:30 CET. 15:30 UTC = 16:30 CET. 16:30 UTC = 17:30 CET. 17:30 UTC = 18:30 CET. 18:30 UTC = 19:30 CET. 19:30 UTC = 20:30 CET. 20:30 UTC = 21:30 CET. 21:30 UTC = 22:30 CET. 22:30 UTC = 23:30 CET. 23:30 UTC = 00:30 CET (next day).
Why it helps
Many scheduled tasks and meetings sit at half past the hour. The table gives the matching CET time at a glance.
Ten readings with minutes
Examples
01:05 UTC = 02:05 CET. 03:20 UTC = 04:20 CET. 05:50 UTC = 06:50 CET. 07:35 UTC = 08:35 CET. 10:10 UTC = 11:10 CET. 13:25 UTC = 14:25 CET. 16:40 UTC = 17:40 CET. 19:55 UTC = 20:55 CET. 22:15 UTC = 23:15 CET. 23:05 UTC = 00:05 CET (next day).
The minutes do not change
A whole-hour difference leaves the minutes as they are. If your answer shows different minutes, you misread the input.
What part of the day is it on the continent?
Continental hours for each UTC hour
06:00 UTC = 07:00 CET (early morning). 08:00 UTC = 09:00 CET (morning). 10:00 UTC = 11:00 CET (morning). 12:00 UTC = 13:00 CET (around midday). 14:00 UTC = 15:00 CET (afternoon). 16:00 UTC = 17:00 CET (afternoon). 18:00 UTC = 19:00 CET (evening). 20:00 UTC = 21:00 CET (evening). 22:00 UTC = 23:00 CET (night).
Using the list
The words in brackets describe the part of the day in Central Europe. They help you pick a polite hour for a call.
European zones from UTC
The ladder
Add zero for London and Lisbon in winter, one for Central Europe, two for Eastern Europe including Bucharest, and three for Moscow. In summer each country that observes daylight saving adds one hour more.
One moment on four clocks
When UTC reads 12:00, London reads 12:00, Paris 13:00, Bucharest 14:00 and Moscow 15:00. Listing the four in an invitation lets nobody have to convert UTC to CET separately.
Dated examples
January
On Wednesday 14 January, 10:00 UTC is 11:00 CET. No daylight saving is in force, so add one hour.
The change itself
On Sunday 29 March the clocks jump at 01:00 UTC. At 10:00 UTC on that day the time is 12:00 CEST, so add two hours.
July
On Wednesday 15 July, 10:00 UTC is 12:00 CEST. Two hours apply all summer.
November
On Wednesday 11 November, 10:00 UTC is 11:00 CET. Europe returned to winter time on 25 October.
Checklist: how to convert UTC to CET
Before
Read the label
CET or CEST? If the source says only “Central European Time”, look at the date: between 29 March and 25 October 2026 it is CEST.
Check the country
Romania is on Eastern European Time, one hour ahead of CET. For Bucharest add two hours in winter.
After
Add one hour
If the total passes 24:00, subtract 24 and advance the date.
Check the date
Only UTC readings from 23:00 onward move to the next date.
Cycling stages and sports broadcasts
Finish times in the evening
The great cycling tours of Europe publish stage schedules in local time. A stage finish forecast for 17:30 CEST in July is at 15:30 UTC, and at 16:30 BST in Britain. Viewers in Romania see it at 18:30 EEST. The race is shown live on the same afternoon in all three countries, but each wall clock shows a different hour.
Time checks along the route
Organisers publish the estimated passing times for each village. A group due at 14:45 CEST passes at 12:45 UTC. When you convert UTC to CET for each checkpoint, you can plan where to stand and when to leave work.
Oktoberfest and other autumn festivals
The tapping of the first keg
Oktoberfest in Munich traditionally opens at noon local time. In September Germany is on CEST, so noon is 10:00 UTC. A live broadcast for Britain begins at 11:00 BST, and for Romania at 13:00 EEST. The same event has three different hours on three wall clocks.
Closing times
The tents close at about 22:30 CEST, which is 20:30 UTC. Visitors with an early flight should convert the departure time, not only the closing hour.
Mistakes when you convert UTC to CET
Subtracting
The continent is ahead of UTC. If the answer is smaller than the UTC time, you subtracted.
One hour in summer
In summer the gap is two hours. A document from July that says CET should be read as CEST.
Romanian time
For Bucharest add two hours in winter and three in summer, not one and two.
Losing the date
23:30 UTC is 00:30 CET the next day. Keeping the date creates a 24-hour error.
Frequently asked questions
How far apart are UTC and CET?
One hour, with CET ahead in winter.
How do I convert UTC to CET?
Add one hour. If the total passes 24:00, subtract 24 and advance the date.
What is 11:00 UTC in CET?
12:00 CET.
Why do I add two hours in summer?
Because Central Europe uses CEST, UTC+2, from the last Sunday in March to the last Sunday in October.
Is my input uploaded?
No. It stays in your browser.
More time zone converters
Related pages: Convert UTC to EST, Convert UTC to PST, Convert CST to CET, Convert EET to CET, Convert CET to CST, Convert PST to UTC, Convert EET to PST, Convert GMT to EST, Convert CST to PST. For the reverse direction, open Convert CET to UTC.
In brief, to convert UTC to CET you add one hour in winter and two in summer, watch the last hour of the UTC day and keep Romania apart from CET. The calculation runs on your own device, with no sign-up and no upload.