28 Shawwal 1447 AH · Fri, Apr 17, 2026
Dhul Qi'dah 1447 AH
القمر الجديد (الاقتران): 2026-04-17 11:51:48 UTC
غروب الشمس
20:00
غروب القمر
20:35
Dhul Qi'dah 1447 AH
Sun, Apr 19, 2026
Dhul Hijjah 1447 AH
Mon, May 18, 2026
Muharram 1448 AH
Wed, Jun 17, 2026
Safar 1448 AH
Fri, Jul 17, 2026
Rabi al-Awwal 1448 AH
Sat, Aug 15, 2026
Rabi al-Thani 1448 AH
Mon, Sep 14, 2026
London's northern latitude (51.5°N) creates unique challenges for crescent moon visibility. During summer months, extended twilight can make the thin crescent difficult to spot, while winter months may offer better contrast but shorter windows above the horizon.
As home to one of Europe's largest Muslim communities, London's crescent visibility conditions are closely watched. Our predictions account for the city's specific sunset and moonset times, providing reliable forecasts for determining Islamic month start dates.
Our system calculates five key astronomical parameters at sunset: moonset lag, moon age, moon altitude, sun-moon elongation, and illumination percentage. These are fed into a machine learning model trained on over 2,000 historical crescent sighting observations to produce a confidence score from 0% to 100%.
Moonset Lag
≥ 45 min
Moon Age
≥ 21 hrs
Altitude
≥ 8°
Elongation
≥ 10°
Illumination
≥ 0.9%
Ramadan 2026
The holy month of fasting, prayer, and reflection observed by Muslims worldwide.
Eid al-Fitr 2026
The Festival of Breaking the Fast, celebrating the end of Ramadan.
Eid al-Adha 2026
The Festival of Sacrifice, the holiest of the two Islamic holidays, marking the culmination of Hajj.
Islamic New Year 2026
The first day of Muharram, marking the beginning of a new Islamic (Hijri) year.
Event dates for London are based on local crescent moon visibility and may differ from other regions.