Prayer Times at High Latitudes: Fajr and Isha in UK, Canada and Nordic Summers

Muslims in Britain, Scandinavia, Canada and northern Europe face a challenge their grandparents in South Asia, Africa or the Middle East rarely did: summer nights in which the sky never becomes fully dark. If Fajr begins when the sun is 18° below the horizon, and the sun never gets that low, when is Fajr? This guide explains the problem and the solutions used by mosques and calculators.

The astronomy in one paragraph

Night becomes fully dark — astronomical night — only when the sun is more than 18° below the horizon. At midsummer, the sun’s lowest point is 90° − latitude − 23.44° below the horizon. For London (51.5° N), that is about 15°. So in June, the sun never reaches 18° below the horizon; twilight lasts all night. Any method that defines Fajr at 18° or 19.5° simply has no answer for those nights.

The problem begins around 48.6° N (where 90 − 48.6 − 23.4 = 18) for 18° methods, which includes Paris, London, Amsterdam, Berlin, Brussels and everywhere further north. With a 15° method it begins around 51.6° N — Birmingham, Manchester and Edmonton are affected — and above about 66.5° N the sun does not set at all in midsummer.

The main solutions

Scholars and astronomers have proposed several ways to estimate Fajr and Isha when twilight never ends. All divide up the night between sunset and sunrise.

1. Angle-based (proportional)

The twilight period before sunrise (for Fajr) and after sunset (for Isha) is capped at a fraction of the night proportional to the angle: for an 18° method, 18/60 of the night; for 15°, 15/60. If the regular calculation exists and is shorter, it is used; if not, the cap applies.

This method changes smoothly through the year and is used by many calculators, including ours.

2. Middle of the night

Fajr is set no earlier than the midpoint of the night, and Isha no later than it. This gives very late Isha and very early Fajr in midsummer, sometimes only minutes apart.

3. One-seventh of the night

The night is divided into sevenths: Isha is set at most one-seventh of the night after sunset, and Fajr at most one-seventh before sunrise. This produces earlier Isha and later Fajr than the angle-based method.

4. Nearest normal day or latitude

Use the Fajr and Isha times from the last day of the year when they existed normally, or from the nearest latitude where they exist — 48° or 45° N, for example. Several European fatwa councils have endorsed variants of this.

5. Makkah or fixed times

Some suggest using fixed intervals — for example, Isha 90 minutes after Maghrib, Umm al-Qura style. This keeps Isha reasonable but is not based on local twilight.

What it looks like in London

Calculated times for London on 21 June 2026, using our angle-based rule:

Method	Fajr	Sunrise	Maghrib	Isha
MWL (18°/17°)	02:31	04:43	21:22	23:27
ISNA (15°/15°)	02:53	04:43	21:22	23:12
Umm al-Qura (18.5°/90 min)	02:27	04:43	21:22	22:52

Compare December 21 with MWL: Fajr 05:59, Maghrib 15:53, Isha 17:51. The night is three hours longer in winter than the entire summer gap between Isha and Fajr.

Many UK mosques publish their own timetables, some based on years of local observation of dawn, which can be noticeably later than the 18° calculation in summer. If your mosque has a timetable, follow it.

Isha and Fajr in practice

In midsummer, the short gap between Isha and Fajr — sometimes barely three hours — creates real difficulties:

• Late Isha: praying at 23:30 and waking for Fajr at 02:30 leaves little sleep, especially for workers and students.
• Taraweeh: when Ramadan falls in summer, taraweeh after Isha can finish after midnight.

Some scholars and councils permit combining Maghrib and Isha in the summer months at high latitudes, on the basis of the hadith that the Prophet ﷺ combined prayers in Madinah “without fear or rain” so as not to cause hardship to his community (Sahih Muslim 705). Others restrict combining to travel, illness or rain. This is a matter for your local scholars; many UK mosques announce whether they combine during the summer.

Long fasts at high latitudes

The same astronomy makes summer fasts very long. When Ramadan fell in June in the late 2010s, London’s fasts ran from about 02:30 to 21:20 — close to 19 hours; in Oslo or Stockholm they exceeded 20 hours.

The majority scholarly view is that Muslims fast according to local dawn and sunset as long as day and night are distinguishable within 24 hours, however long the day. Some contemporary scholars allow following the times of Makkah or of the nearest moderate latitude where the day is extremely long (around 20 hours or more) and fasting would cause harm. Those who genuinely cannot fast safely fall under the Quran’s concessions for illness (2:184).

The good news for the 2020s and 2030s: Ramadan is now in winter in the northern hemisphere. Ramadan 1448 (February 2027) fasts in London are about 11½ hours, and Ramadan 1449 (late January 2028) about 11 hours. The long summer fasts will not return to northern Europe until the 2040s.

A summer routine that protects sleep

Families at high latitudes have developed practical routines for the short summer nights. A few that work:

• Nap after work. A 30–60 minute sleep in the early evening makes a late Isha and early Fajr far more manageable.
• Pray Isha at its start time. The gap between Isha and Fajr is short enough already; delaying Isha shortens the night further.
• Go back to sleep after Fajr if your schedule allows, rather than staying up until work.
• Children: many scholars and parents prioritise sleep for children who are not yet obliged to pray, praying Isha with them early (where combining is followed) or letting them sleep before Isha.
• Weekends: shift longer worship — Quran, dhikr — to weekend mornings rather than adding it to short summer nights.

What about places where the sun doesn’t set?

Above the Arctic Circle (about 66.5° N), there are days in summer when the sun never sets, and in winter when it never rises. Scholars have long discussed these regions; the hadith of the Dajjal, in which the Prophet ﷺ was asked about a day “like a year” and replied, “Estimate for it its due measure” (Sahih Muslim 2937), is often cited as the basis for estimating prayer times when the normal signs are absent. Most fatwas advise following the times of the nearest location where day and night are distinguishable, or of Makkah.

Choosing a method if you live at a high latitude

1. Use your local mosque’s timetable if it has one — especially for Fajr and the end of suhoor.
2. If you use an app, pick a high-latitude rule deliberately rather than leaving it on a default you do not understand. The angle-based rule is a sound middle ground.
3. Be consistent through the summer.
4. For suhoor, stop eating a few minutes before the Fajr time you follow.

Our London, Birmingham and Manchester prayer pages use the angle-based rule with the Muslim World League method by default; you can switch methods in the settings.

Summary

• Above about 48.6° N (18° methods), the sun never sinks low enough for normal Fajr and Isha in midsummer.
• Calculators use angle-based, middle of the night, one-seventh or nearest-latitude rules to fill the gap.
• In London in June, Isha can be after 23:00 and Fajr before 02:30.
• Follow your local mosque; combining Maghrib and Isha in summer is permitted by some scholars and not others.
• Winter Ramadans in the 2020s–2030s bring short fasts to the north.