🇹🇭 Bangkok

Bangkok uses the Muslim World League method (method 3 in our calculator), an 18° Fajr and 17° Isha convention adopted as the practical default by the city's mosques because Thailand has no nationwide Islamic authority prescribing a single calculation method. The Sheikhul Islam Office of Thailand, the official body representing Muslims, publishes regional guidance but leaves the final calibration to provincial Islamic councils and individual mosque administrations. Bangkok's main congregations — including the Foundation of Indonesian Muslim Student in Ban Khrua and the larger Pattani-tradition mosques in the eastern districts — use MWL as a balanced default appropriate for the city's 13.8°N tropical latitude. Apps configured for Umm al-Qura, Karachi or Egyptian conventions will display Fajr and Isha drifting by a handful of minutes from what local mosques announce, while Dhuhr, Asr and Maghrib are identical because they depend on the sun's transit and altitude rather than the twilight angle.

Prayer times in Bangkok stay remarkably stable across the year because the city sits at only 13.8°N, well within the tropics, so day length varies by less than ninety minutes between the summer and winter solstices. In late June, sunrise is around 05:50 and Maghrib around 18:50, producing roughly thirteen hours of daylight; by late December those values shift modestly to a 06:35 sunrise and a 17:50 Maghrib, giving about eleven hours twenty minutes. The full Fajr-to-Maghrib swing across the year is therefore under two hours, in stark contrast to mid-latitude cities where the same swing exceeds five hours. The bigger practical disruption is the monsoon between May and October, when heavy cloud cover makes horizon observation impossible and the city's mosques rely entirely on calculated tables. Bangkok's mosques publish monthly timetables to capture the gentle drift smoothly across each month.

Bangkok hosts a long-established Muslim community estimated at roughly 5–10 percent of the city's population, with two main historical streams: descendants of Cham and Persian merchants who settled along the canals during the Ayutthaya and early Bangkok periods, and Pattani-Malay families from the southern provinces. The Foundation of Indonesian Muslim Student community in Ban Khrua is one of the city's oldest Muslim neighbourhoods, dating to the 18th-century resettlement of Cham Muslims under Rama I. More recent additions include South Asian merchants in the Phahurat-Pratunam areas and Arab and Iranian residents in Sukhumvit. The Sheikhul Islam Office of Thailand and the Bangkok Islamic Committee coordinate community life, and Thailand recognises a system of provincial Islamic councils. Halal-certified Thai food is widely available, and several hundred mosques and prayer rooms are scattered across the metropolitan area, particularly along the canals of Thonburi and the eastern Min Buri district.

Friday prayers can be attended at over a hundred mosques across Bangkok, with the largest congregations concentrated in the eastern Min Buri and Nong Chok districts where Pattani-Malay residents predominate, and in the older central neighbourhoods. Masjid Jamiul Khairiah in Ban Khrua, near the Saen Saep canal in central Bangkok, is one of the most historically significant Friday gatherings, anchoring the Cham-descended community that has prayed on the site since the late 18th century. The Foundation of Indonesian Muslim Student mosque, Masjid Indonesia in Sathorn, serves the Indonesian expatriate community and visiting students, while Darool Aman Mosque in Phra Khanong and Haroon Mosque near the Chao Phraya river are well-known central-city congregations. Friday khutbas are typically delivered in Thai or Malay depending on the mosque, with Arabic recitation, and most start between 12:30 and 13:00.

Prayer times differ between cities because they are calculated from the position of the sun, which depends on each city's latitude, longitude and the date. Bangkok sits at 13.8°N, 100.5°E in the Asia/Bangkok time zone, well within the tropics, so its day length varies less across the year than mid-latitude cities and its solar noon falls at a clock time no other city shares exactly. Two cities at very different latitudes — say London at 51°N and Riyadh at 24°N — experience twilight over very different durations, so Fajr, Maghrib and Isha can sit hours apart even on the same calendar date. Even cities at similar latitudes drift if they sit in different time zones or follow different calculation conventions for the Fajr and Isha twilight depression angles, which is why Bangkok, Manila and Ho Chi Minh City all near 14°N publish slightly different daily timetables.