The short answer is: games don't "run" for an hour in Brazil due to Champions League decisions. What changes is the difference between the European clock and Brasília time. Brasília remains in UTC-3, while much of Europe sets its clocks forward in the spring and back in the fall. Therefore, a 9pm game in Central Europe may appear at 4pm in Brazil in one part of the season and at 5pm in another.
In the 2026/27 season, the most noticeable change occurs at the end of October 2026. Europe ends summer time on October 25th. After that date, the difference between Central Europe and Brasília drops from five to four hours. When the European spring returns, on March 28, 2027, the difference increases again to five hours.
The rule that resolves the question of 4pm or 5pm
For cities in Central Europe, such as Madrid, Paris, Munich, Milan and most of the most frequent Champions League venues, the practical calculation is this: during European summer time, the local clock is five hours ahead of Brasília; during the winter period, it is four hours ahead.
This turns the 9pm base time into two different conversions. While Central Europe is on summer time, 9pm local time corresponds to 4pm in Brasília. When European clocks return to standard time, 9pm corresponds to 5pm in Brasília.
The same reasoning applies to the 6:45 pm window. During the European summer period, 6:45 pm in Central Europe corresponds to 1:45 pm in Brasília. In the European winter, they start at 2:45 pm.
Why Brasília remains stable while Europe changes
Brasília remains in UTC-3
Brazil ended the adoption of summer time in 2019. Since then, Brasília time has not advanced an hour in the spring nor returned in the Brazilian summer. For conversion of European games, this means that the Brazilian side of the account remains stable in UTC-3.
This stability is precisely why the European effect is so visible. If one side does not change and the other moves the clock by one hour, the difference between them also changes by one hour.
Central Europe alternates between CET and CEST
In the standard period, Central Europe uses CET, equivalent to UTC+1. In daylight saving time, it switches to CEST, UTC+2. European rules maintain the clock change on the last Sunday in March and the return on the last Sunday in October, with a 60-minute advance.
In 2026, European summer time starts on March 29th and ends on October 25th. In 2027, it starts on March 28th and ends on October 31st. For the 2026/27 Champions League season, the two dates that interest Brazilian fans are, therefore, October 25, 2026 and March 28, 2027.
London uses GMT and BST
London is not in the same zone as Central Europe. In the British winter, the UK uses GMT, UTC+0. During British Summer Time, it uses BST, UTC+1. In 2026 and 2027, British clock changes occur on the same relevant dates as in continental Europe: 25 October 2026 to return to GMT and 28 March 2027 to return to BST.
For this reason, London is an hour behind Central Europe in both summer and winter. This difference is important when the source shows the stadium's local time rather than a UEFA base time.
Quick guide by period of the 2026/27 season
Until October 24, 2026
Europe is still on summer time. In Central Europe, CEST is UTC+2 and the difference to Brasília is five hours. Thus, 9 pm local time became 4 pm in Brasília, and 6:45 pm became 1:45 pm.
In London, BST is UTC+1 and the difference to Brasília is four hours. A game scheduled for 8pm local time in London corresponds to 4pm in Brasília. If a source indicates 9pm local time in London, the conversion will be 5pm in Brasília. The point is always to identify which clock the source is using.
From October 25, 2026 to March 27, 2027
With the end of summer time, Central Europe returns to CET, UTC+1. The difference to Brasília drops to four hours. During this period, 9pm local time becomes 5pm in Brasília, and 6:45pm becomes 2:45pm.
London returns to GMT, UTC+0, remaining three hours ahead of Brasília. A game at 8pm London time becomes 5pm in Brasília. It is this one-hour change that makes many Brazilian tables appear to have changed the competition time.
From March 28, 2027
Europe sets the clocks forward again. Central Europe returns to CEST and is once again five hours ahead of Brasília. The time of 9 pm corresponds to 4 pm in Brazil, and 6:45 pm returns to 1:45 pm.
In the United Kingdom, the return to BST makes London four hours ahead of Brasília. A start at 8pm local time returns to 4pm Brasília time.
Where the change appears in the 2026/27 Champions League calendar
The official UEFA calendar makes the transition especially easy to see in the second half of 2026. The third round of the league phase is scheduled for October 20th and 21st, even before the European clock change of October 25th. The fourth round takes place on November 3rd and 4th, after the change.
This means that two relatively close matches can appear an hour apart in Brazil even when UEFA maintains the same European base time. A main slot game in Central Europe that falls on October 20th or 21st tends to be converted to 4pm in Brasilia; after the turn, an equivalent game on November 3rd or 4th tends to appear at 5pm.
The same logic reappears in the knockout phase. The round of 16 return games are on the calendar for March 16 and 17, 2027, even before the clocks advance. The quarterfinals are scheduled for April 6th and 7th and April 13th and 14th, after the change of March 28th. Thus, the central 9pm slot returns from 5pm to 4pm in Brazil between these phases.
What do 21:00 CET and 18:45 CET mean in the UEFA rule
The 2026/27 Champions League regulations establish that, from the play-offs onwards, the schedules are defined by the UEFA administration. As a general rule, play-offs and league stage games start at 9pm CET, with selected league stage matches starting at 6:45pm CET. UEFA also provides for exceptions, and the initial knockout stages may use 6:45 pm or 9:00 pm.
For Brazilian fans, care is taken not to treat the acronym CET automatically and isolated from the date and city. UEFA uses this time as a competition reference, but the stadium's local clock follows the current time zone in that country. In a central European headquarters during the summer, the local clock is in CEST. In London, the same European slot usually corresponds to a different local time.
Safe conversion starts at the time actually published for that game, after the table is confirmed. The regulation informs the general rule; The match-specific page informs what will be applied in that match.
London should not be converted into Paris, Madrid or Munich
This is one of the most common mistakes. If a game in London is aligned with the UEFA main slot, the local kick-off is usually an hour ahead of the Central European clock. While Paris or Madrid might show 9pm, London might show 8pm for the same real time.
Before October 25, 2026, 8pm in London corresponds to 4pm in Brasília. From October 25th, 8pm in London corresponds to 5pm. After March 28, 2027, they will return to 4pm.
If the information you received already says "9pm in London", do not apply the Central European 9pm account. Use the London time zone. In the British summer, 9pm local time is 5pm in Brasília; in winter, it's 6pm.
Not all European headquarters are in London or Central Europe
The expression "European time" is useful in conversation, but inaccurate in conversion. Mainland Portugal follows a western zone similar to the British. Eastern European countries can be an hour ahead of Central Europe. Turkey, for example, follows another time zone configuration. Clubs from even more distant associations can produce greater differences.
So the 4pm or 5pm rule works great for the main slot at Central European venues and for British matches lined up at the same time, but should not be applied blindly to any city on the UEFA map.
Why websites and streams sometimes show different times
The first cause is the date. An old page may have been published before the clock change or based on a different phase of the season. The second is the reference used: one website may show the stadium's local time, another may use CET as a reference and a Brazilian broadcaster may already display the time converted to Brasília.
There are also sporting and operational exceptions. UEFA's own regulations say that the times of 9pm and 6:45pm are the rule "in principle" and allow changes by the competition administration. A specific confrontation may therefore deviate from the standard.
Therefore, when the information is important to watch the game live, the correct question is not just "is the Champions League at 4pm or 5pm?". The complete question is: in which city, on what date and what official time was confirmed for that match?
How to validate an official time without making the conversion wrong
Step 1: confirm the date and headquarters
Start on the official UEFA page or the official competition calendar. The date determines whether Europe is in summer or winter, and the city determines which local time zone should be used.
Step 2: identify whether the time shown is local or reference time
If the page explicitly states CET, CEST, GMT or BST, use that indication. If it only shows the time next to the stadium or match, check whether the website is displaying the local time or already adapting it to your location.
Step 3: apply the correct difference for Brasília
For Central Europe, subtract five hours in the European summer period and four hours in the winter. For London, subtract four hours during BST and three hours during GMT.
At the most common Champions League times, this produces the pattern that fans perceive in practice: 9pm in Central Europe becomes 4pm in the European summer and 5pm in winter; 6:45 pm becomes 1:45 pm and 2:45 pm, respectively.
Step 4: Check again near the game
After draws, stadium definitions or broadcast adjustments, UEFA may confirm exceptions. The schedule of the broadcaster or platform broadcasting in Brazil is also useful as a final check, as long as it is updated for the same date as the match.
The simplest way to remember
For most games played in the Central European time zone, think of two clock seasons, not two different Champions League times. When Europe is on daylight saving time, Brazil sees the 9pm to 4pm slot. When Europe returns to standard time, Brazil sees this same slot at 5pm.
In the 2026/27 season, mark two dates: October 25, 2026, when the typical Brazilian time for main games changes from 4pm to 5pm; and March 28, 2027, when the bill returns from 5pm to 4pm. From there, just confirm the city and the official time of the match to avoid relying on outdated tables.
