Distinguishing the Late from the Absent, and the Guidance That Follows
The question of ʿIshāʾ timing during the British summer is among the most practically consequential Fiqhi matters facing Muslim communities in the United Kingdom. Each year, as the nights shorten and twilight lingers in the northern sky, mosques, imams, and scholars across the country are confronted with a recurring challenge: when does ʿIshāʾ time enter, and how should it be observed?
This guidance paper has been produced in response to scholarly submissions received by the BBSI. It seeks to bring greater clarity to a matter that has, in practice, been treated with insufficient precision. The BBSI does not issue this paper as the final or sole word on a question that remains the subject of legitimate scholarly difference. Rather, it is offered as a contribution to structured, principled discourse, one that we hope will assist imams, mosque committees, and scholars in reaching locally informed and Fiqhi-grounded conclusions.
This paper draws on the work of scholars who have engaged with the subject in depth; it reflects a concern raised with increasing frequency in BBSI correspondence: that the specific Fiqhi situation of ʿIshāʾ entering very late, as distinct from ʿIshāʾ not entering at all, is being addressed using reasoning that does not properly apply to it.
The Phenomenon: Understanding the British Summer Sky
The United Kingdom lies at a high northern latitude. During the summer months, this produces two related but legally distinct phenomena. The first is perpetual twilight: a period typically several weeks around the summer solstice during which the sky never darkens sufficiently for the red twilight (shafaq aḥmar) to fully disappear. During this period, the conventional astronomical sign for the entry of ʿIshāʾ is entirely absent.
The second phenomenon is less frequently discussed, yet it affects a significant period of the year: the extended period during which ʿIshāʾ time enters, but only very late in the night, often between 11:00 PM and 1:00 AM, depending on location and the angular threshold adopted. This is not perpetual twilight; twilight does eventually disappear, and ʿIshāʾ time does enter. The challenge is one of lateness, not absence.
This distinction is the central concern of this guidance paper. These are two separate Fiqhi realities, and they demand separate Fiqhi treatment. Much of the confusion in current practice arises from conflating them and applying reasoning developed for one to the other.
It is worth noting that the question of how to determine ʿIshāʾ in high latitudes has a long history in Islamic scholarship. As early as the 4th century Hijri, Ibn Faḍlān observed communities in the Bulghār region (present-day Russia) combining Maghrib and ʿIshāʾ due to the absence of true night, an early indication that classical scholars were not unaware of the geographic realities of the northern world.
The Fiqh of Perpetual Twilight: A Summary of Scholarly Positions
Where ʿIshāʾ time does not enter at all, i.e., the period of genuine perpetual twilight, scholars have generally converged around four positions:
- Suspension of the ʿIshāʾ Obligation
Some classical Ḥanafī scholars held that if the sign for ʿIshāʾ never appears, the obligation is suspended. This was likened to the omission of a limb in wuḍūʾ when that limb is absent. While historically practised, this view is now largely rejected by contemporary scholars, given the explicit scriptural evidence establishing five obligatory prayers.
- Praying ʿIshāʾ at the Time of Fajr
A second view holds that in the absence of a valid entry time, one should wait until the time of the following prayer, Fajr, before performing ʿIshāʾ. The rationale draws on the principle that a prayer performed before its time is invalid, while one performed after its time has expired is valid as qaḍāʾ. Though conceptually coherent, this view has limited traction in contemporary practice.
- Estimation of ʿIshāʾ Time
The most widely adopted position among UK mosques is estimation, typically adding approximately 1 hour and 15–20 minutes after Maghrib, reflecting the typical interval between the two prayers during most of the year. This is the position adopted by Wifaqul Ulama, whose timetables are used by a large number of mosques across the country. Proponents of estimation also cite the ḥadīth of the Dajjāl, in which the Prophet ﷺ instructed believers to “estimate the time accordingly” when the structure of the day is abnormally disrupted.
- Joining Maghrib and ʿIshāʾ
A fourth position holds that the principle of shared time (waqt mushtarak) between Maghrib and ʿIshāʾ provides the most legally grounded solution when no independent entry time for ʿIshāʾ can be determined. Proponents argue that the Qur’ānic verse, “Establish prayer from the decline of the sun until the darkness of the night” (17:78), affirms a continuum between these prayers. They further note that the length of time a concession is used does not, in principle, negate its validity, drawing an analogy with the traveller who shortens prayers over an extended period of travel.
It is well established that the Muslim population of the UK is predominantly Ḥanafī, and the Ḥanafī school is classically the most restrictive about the permissibility of joining prayers. This explains why Position 3 (estimation) remains dominant in mosque practice. The BBSI does not seek to adjudicate between Positions 3 and 4 on the question of perpetual twilight in this paper. Both positions have a scholarly basis, and mosques and scholars should engage with the detailed arguments presented by qualified scholarship in reaching their own conclusions.
A Distinct Fiqhi Question: The Late ʿIshāʾ Outside Perpetual Twilight
It is here that the BBSI wishes to draw the attention of imams and mosque committees to a matter of significant legal concern. Outside the narrow period of perpetual twilight during the weeks immediately preceding and following it, ʿIshāʾ time does in fact enter. It enters late, sometimes very late, but it enters.
The question of which angular threshold to adopt, 13°, 15°, 16°, or 18°, is an area of scholarly disagreement. However, this disagreement concerns when twilight disappears, not whether it disappears. As the summer progresses, the entry of ʿIshāʾ is gradually delayed until it ceases altogether during the period of perpetual twilight. Conversely, as summer recedes, ʿIshāʾ returns initially late, then progressively earlier. During this extended window on either side of perpetual twilight, ʿIshāʾ time is legally established, even if it falls inconveniently late.
What has become a widespread practice in many UK mosques during this period is a blanket estimation of ʿIshāʾ, typically 1 to 1.5 hours after Maghrib, applied regardless of whether the red twilight has in fact disappeared. This practice is often justified by invoking the concept of ḥaraj (undue hardship). The result is that, across several weeks of the year, congregations are performing ʿIshāʾ before its Sharʿī time has entered. This is a serious legal matter that merits clear institutional acknowledgement.
- Why the Evidence for Perpetual Twilight Does Not Apply Here
Those who justify early estimation during this period typically draw on the same scriptural and legal arguments used to address perpetual twilight. The BBSI considers it important to articulate why these arguments, while valid in their proper context, do not straightforwardly extend to this situation.
The Ḥadīth of the Dajjāl
This ḥadīth instructs believers to “estimate the time accordingly” in a scenario where the very structure of the day is eschatologically disrupted, one day lasting as long as a year. The operative legal condition is the absence of discernible temporal markers altogether. When ʿIshāʾ time does enter, albeit late, this condition does not obtain. The prophetic instruction to estimate does not apply to situations of inconvenience, only to situations of genuine temporal impossibility.
Concession Becoming Normative
The concern raised by proponents of estimation that joining prayers over three to four months would render a concession normative applies equally to the practice of estimating early ʿIshāʾ. If ʿIshāʾ is routinely performed one hour after Maghrib regardless of the actual entry time, across the better part of the summer, the concession has already been transformed into standard practice.
Absence of Precedent for Praying before the entry of time
One of the most serious legal concerns is the following: to the knowledge of the BBSI, no classical scholar across any of the four Sunni schools of law permits the performance of a prayer before its appointed time on grounds of hardship. The legal maxim is clear — a prayer performed before its time is invalid (bāṭil), regardless of the difficulty that would attend waiting. Where hardship exists, the Sharīʿah provides alternative mechanisms, most notably, the joining of prayers rather than the advancement of a prayer beyond its lawful window.
This leads to a somewhat striking conclusion: the classical Hanafi position of praying ʿIshāʾ at the time of Fajr, though not endorsed as a practical recommendation nor practised by contemporary Hanafis in the UK, is arguably more legally sound than the practice of performing ʿIshāʾ before the time has entered. Inconvenience does not, in Islamic jurisprudence, provide a basis for the invalidity of a prayer.
A Possible Approach: Joining Maghrib and ʿIshāʾ During the Period of Extended Delay
Given the analysis above, a possible approach during the period of lateʿIshāʾ is joining Maghrib and ʿIshāʾ, which is arguably more legally grounded than performing ʿIshāʾ at an estimated time before its entry.
The principle of combining prayers is established across the schools of law, albeit under differing conditions. The concept of waqt mushtarak, a shared time between Maghrib and ʿIshāʾ, is recognised within classical Fiqh, and the verse from the Qur’an (17:78), “Observe the prayer from the decline of the sun until the darkness of the night and the dawn prayer, for certainly the dawn prayer is witnessed ˹by angels˺,” provides broader textual grounding for understanding these prayers in continuity. Unlike estimating ʿIshāʾ early, joining does not require the performance of a prayer outside its legally prescribed time.
The BBSI acknowledges that this position raises questions for Ḥanafī-majority communities, where joining prayers is more restricted. Scholars and mosque committees within that tradition are encouraged to engage carefully with the arguments presented in specialist scholarship and to consult with qualified fuqahāʾ in reaching a considered local determination. The BBSI does not seek to override established madhhab practice but to ensure that whatever position is adopted rests on sound Fiqhi foundations rather than administrative convenience.
Practical Guidance for Masājid and Scholars
In light of the above, the BBSI offers the following practical guidance to mosque committees, imams, and scholars:
- Recognise the legal distinction. A clear differentiation must be drawn between the period of genuine perpetual twilight (ʿIshāʾ time absent) and the period of extended delay (ʿIshāʾ time present but late). The Fiqhi approach to each is different and should be treated accordingly.
- Review the basis for current practice. Where mosques are currently performing ʿIshāʾ at a fixed estimated time during the extended delay period, committees and imams should review whether this practice is being applied with awareness of its legal implications or simply as an administrative default inherited from the perpetual twilight discussion.
- Prioritise Fiqhi soundness over convenience. Administrative ease is a legitimate consideration in institutional planning, but it cannot serve as a standalone justification for a practice that involves performing a prayer before its prescribed time. Communities deserve guidance that is both practically sensitive and legally coherent.
- Consider adopting the joining of prayers during the late Isha period. For communities where this can be accommodated within their scholarly tradition, joining Maghrib and ʿIshāʾ during this period is a more legally defensible response to the hardship of very late timings than performing ʿIshāʾ early.
- Display actual Sharʿī entry times on all timetables. Regardless of the position adopted, mosque timetables should clearly display the actual astronomical entry time for ʿIshāʾ alongside any adjusted congregational time. This serves two purposes: it educates the congregation as to the Fiqhi basis of any departure from actual time, and it preserves the option for those who can pray at the correct Sharʿī time to do so. Transparency in timetabling is itself a form of fiqhi integrity.
- Engage in communal scholarly discussion. The BBSI encourages mosques and imams to create space for informed discussion of these questions within their own scholarly and community contexts. This is not an issue that admits of a single mandated resolution but one that calls for principled engagement, consultation (shūrā), and intellectual honesty.
- Avoid accusation and division. The purpose of this guidance is not to declare existing practice invalid or to generate conflict within communities. The BBSI recognises that many mosques have adopted current approaches in good faith and with sincere concern for community welfare. The aim is to invite greater precision and to ensure that future practice is consciously, rather than inadvertently, adopted.
Conclusion
The question of ʿIshāʾ during the British summer is not new, but it remains imperfectly addressed. The extensive scholarly literature on perpetual twilight has provided valuable foundations for mosque practice. What has received insufficient attention is the legally distinct situation of ʿIshāʾ entering very late, a situation that affects a far greater portion of the year than perpetual twilight itself and that cannot be resolved by the same evidence.
Islamic jurisprudence does not permit the performance of a prayer before its time under any circumstance, including hardship. It does, however, provide the mechanism of joining prayers precisely to address cases of genuine difficulty. It is the considered view of the BBSI that applying this mechanism, where the scholarly tradition of the community permits it represents a more legally sound response to the challenge of late ʿIshāʾ than advancing the prayer to before its entry time.
The BBSI calls upon scholars, imams, and mosque committees to engage with this matter with the seriousness it deserves. The prayer times of our communities are not a peripheral matter of administrative scheduling; they are among the most fundamental expressions of our collective practice of the dīn. Ensuring that they are observed with Fiqhi integrity and with transparency to our congregations is a responsibility that falls upon all those entrusted with Islamic leadership.
info@bbsi.org.uk
References & Further Reading
https://www.leedsgrandmosque.com/isha-prayer-in-british-summer
Late but present Fiqh of Isha outside perpetual twlight
al-Shaybānī, Muḥammad b. al-Ḥasan. al-Aṣl. Ed. Muḥammad Boynukalın. Beirut: Dār Ibn Ḥazm, 1433 AH / 2012.
al-Nasafī, ʿAbd Allāh b. Aḥmad. Kanz al-Daqāʾiq. Ed. Sāʾid Bakdāsh. Beirut: Dār al-Bashāʾir al-Islāmiyya, 1432 AH / 2011.
Ibn ʿĀbidīn, Muḥammad Amīn. Radd al-Muḥtār ʿalā al-Durr al-Mukhtār. Beirut: Dār al-Fikr, 2nd ed., 1412 AH / 1992.
al-Judayʿ, ʿAbd Allāh b. Yūsuf. “Bayān ḥukm ṣalāt al-ʿIshāʾ fī ṣayf Brīṭānyā ḥīna yuftaqadu waqtuhā.” al-Majalla al-ʿIlmiyya lil-Majlis al-Ūrubbī lil-Iftāʾ wal-Buḥūth, No. 4–5 (June 2004), pp. 315–343.
Wifaqul Ulama UK. (n.d.). High Latitude. https://www.wifaqululama.co.uk/highlat/
Haddad, H. (2012, June 19). “Summer Isha & Fajr prayer times.” Islam21c. https://www.islam21c.com/islamic-law/166-summer-isha-
a-fajr-prayer-times/