If you live in Berlin, Amsterdam, London or Stockholm, you have probably noticed that in June your prayer timetable looks strange. Isha may be listed after midnight, Fajr before 3 am, and two different apps or mosques can disagree by an hour or more. This is not a bug. It comes from a real astronomical problem, and Muslim scholars and timetable makers in Europe have answered it in several different ways.
Why summer nights cause a problem
Most calculation methods define Fajr and Isha by how far the sun is below the horizon. Fajr begins when the sun is about 18° below the horizon before sunrise, and Isha when it reaches roughly 17–18° below after sunset (the exact angle depends on the method: the Muslim World League uses 18° for Fajr and 17° for Isha).
Near the equator the sun drops well past 18° every night of the year. In northern Europe it does not. Around the June solstice the sun's declination is about +23.44°, so at midnight it sinks only 90° − latitude − 23.44° below the horizon. For it to reach 18°, the latitude must be below roughly:
90 − 23.44 − 18 ≈ 48.6°N
North of that line, there are summer nights when the sky never gets dark enough for the 18° definition. Twilight simply continues from sunset to sunrise. Astronomically, there is no Fajr and no Isha moment to calculate.
This affects almost all of Germany, the Netherlands, Belgium, the UK, Denmark and Scandinavia. Munich (48.1°N) just escapes it; Frankfurt does not. Approximate periods with no 18° night:
- Frankfurt (50.1°N): early June to mid-July
- London (51.5°N): late May to late July
- Berlin and Amsterdam (about 52.5°N): around 20 May to late July
- Hamburg (53.6°N): mid-May to the end of July
- Copenhagen (55.7°N): early May to early August
- Stockholm and Oslo (about 59–60°N): late April to around 20 August
In Oslo the sun only dips about 6.7° below the horizon at the solstice, so the "night" is really a long civil twilight. Further north, inside the Arctic Circle, the sun does not set at all for part of the summer, and even Maghrib has to be estimated.
The common solutions
Because the astronomical definition breaks down, timetables use a rule to estimate Fajr and Isha on these nights. "Night" here usually means the time between sunset and sunrise. The main approaches are:
Middle of the night
Isha may not be later, and Fajr not earlier, than the midpoint of the night. It is simple, but in the shortest nights both prayers end up at, or very close to, the same moment, which many people find impractical.
One-seventh of the night
The night is divided into seven parts. Isha is placed no later than the end of the first seventh, and Fajr no earlier than the start of the last seventh. This gives earlier Isha and later Fajr times than the middle-of-the-night rule.
Angle-based (twilight angle)
The fraction of the night used depends on the angle of the method: the angle divided by 60. With an 18° Fajr angle, Fajr is set no earlier than 18/60 = 30% of the night before sunrise; with a 17° Isha angle, Isha no later than about 28% of the night after sunset. On nights when the real twilight moment exists and falls within that limit, the real time is used.
Here is how the three rules compare for Berlin on 21 June (sunset about 21:33, sunrise about 04:43, a night of roughly 7 hours 10 minutes), before any mosque-specific minute adjustments:
| Rule | Isha (approx.) | Fajr (approx.) |
|---|---|---|
| Middle of the night | 01:08 | 01:08 |
| One-seventh of the night | 22:34 | 03:42 |
| Angle-based (17° / 18°) | 23:35 | 02:34 |
Nearest latitude and nearest day
Two older juristic approaches are also discussed. Nearest latitude (aqrab al-bilad) borrows the times of a place further south where the signs of Fajr and Isha still appear, often around 45–48°N. Nearest day (aqrab al-ayyam) uses the times from the last date in spring when Fajr and Isha were still clearly distinguishable, and keeps them until they return in late summer.
There are also community timetables that use smaller angles in summer or fixed intervals after Maghrib. None of these choices is a "wrong" one; each has scholars behind it.
Who decides in practice
Europe has no single authority for prayer times, so what you follow usually depends on your community:
- Turkish communities, especially in Germany, often follow the timetables published by Türkiye's Presidency of Religious Affairs (Diyanet), which are used in DITIB mosques.
- The UK has many local timetables. In London, several major mosques use a unified timetable, while others follow their own.
- The European Council for Fatwa and Research, a body of scholars focused on Muslims in Europe, has addressed high-latitude prayer and fasting times in its resolutions, and its views are widely referenced.
- Local mosques across Germany, the Netherlands and Scandinavia frequently publish their own yearly calendars, which reflect the opinion their imams and boards have adopted.
On some summer nights the gap between Maghrib and Isha becomes very short, or Isha falls very late. Some communities permit combining Maghrib and Isha in this situation, others do not. This is a question of fiqh rather than astronomy, so ask your imam rather than an app.
Winter: the opposite problem
In December the issue reverses. Days are short: in Berlin and London the sun is up for less than eight hours, and in Oslo or Stockholm for about six. Sunset in Berlin is before 4 pm, so Dhuhr, Asr and Maghrib all fall within about four hours. Prayer at work or school needs a bit of planning, but the times themselves are easy to calculate because the nights are dark.
Fasting is affected too. Ramadan moves about 11 days earlier each year, and it is currently moving into winter: it begins in early February in 2027 and reaches late January in 2028. For the next several years, fasts in northern Europe will be comparatively short. When Ramadan returns to the summer months in the future, fasts of 18 hours or more will again be common, and Fajr will depend directly on the high-latitude rule your community uses. That is a strong reason to settle on one approach now.
How WAQT handles it
When you pick a location in the UK, Germany, the Netherlands, Belgium, Austria, Switzerland, Sweden, Norway, Denmark, Finland, Spain or Italy, WAQT defaults to the Muslim World League method (Fajr 18°, Isha 17°) with the angle-based high-latitude rule. You can switch to any of its 25 calculation methods, including Diyanet (Türkiye) and the London Unified Timetable, or choose Custom Settings to set the angles and pick between the 1/2 of night, 1/7 of night and angle-based rules yourself.
If your mosque's calendar still differs by a few minutes, you can shift each prayer individually by minutes so the app matches the timetable you actually follow.
Practical takeaways
- In summer, north of about 48.6°N, there are nights with no true 18° darkness; any Fajr or Isha time on those nights is an estimate based on a rule.
- Find out which timetable your local mosque or community body uses, and which high-latitude rule it is based on.
- Set your app to match that timetable rather than comparing several apps.
- Stay consistent through the year, especially for Fajr during summer fasts.
- Where scholars differ, such as combining prayers or which rule to use, follow your local authority and ask your imam.