🇺🇸 Washington DC

Washington DC uses the Islamic Society of North America method (method 2 in our calculator), a 15-degree Fajr and 15-degree Isha convention adopted as the de facto continental standard for the United States and Canada. The Islamic Center of Washington on Massachusetts Avenue, the ADAMS Center in Sterling, the Diyanet Center of America in Lanham and most major DC-region mosques publish their timetables on this basis. ISNA's 15-degree angles are deliberately shallower than the 18-degree Muslim World League standard, producing later Fajr and earlier Isha — a calibration that addresses the practical challenge of high-latitude North American summers, when 18-degree calculations would push Fajr unreasonably early and Isha unreasonably late. The Fiqh Council of North America formally endorsed the 15/15 convention. Apps set to MWL will show Fajr noticeably earlier and Isha noticeably later in summer; ISNA is the consensus practical default in the DC area.

Prayer times in Washington DC shift substantially between summer and winter, driven by the city's 38.9°N latitude — high enough to feel a clear seasonal swing but well south of the abnormal-twilight problems that affect higher-latitude US cities such as Anchorage. In late June, Fajr is calculated for around 04:20, sunrise comes near 05:45, Maghrib falls around 20:35 and Isha sits near 21:55, giving roughly fourteen and a half hours between Fajr and Maghrib. By late December, sunrise slips toward 07:25, Maghrib arrives around 16:50 and Isha follows around 18:15, compressing the gap to about ten hours. Daylight-saving shifts in March and November jolt clock times by an hour and can briefly confuse worshippers whose apps lag the change. The equinoxes in March and September are the calmest periods. ISNA's 15-degree calibration keeps summer Fajr and Isha at practical times.

The Washington DC region hosts one of the largest and most institutionally developed Muslim communities in the United States, with metropolitan-area estimates ranging from roughly 250,000 to 400,000 — drawing on the broader US Muslim population estimated at around 3.5 million by Pew. The DC community is exceptionally diverse: African American Muslim families with multi-generational roots in the District (centred historically around Masjid Muhammad on 4th Street NW), South Asian, Arab and West African professionals concentrated in the Northern Virginia and Maryland suburbs, and a substantial Iranian and Turkish presence linked to embassies, federal employment and university institutions. The community is anchored by major institutions: the Islamic Center of Washington (1957) on Embassy Row, the ADAMS Center in Sterling Virginia (one of the largest American mosque networks), Dar Al-Hijrah in Falls Church and the Diyanet Center of America in Lanham, Maryland.

The Islamic Center of Washington at 2551 Massachusetts Avenue NW, opened in 1957 along Embassy Row and dedicated by President Eisenhower, is the symbolic and historic centre of American Islam in the federal capital and a principal Friday gathering point. Built in classical Mamluk style with a 49-metre minaret, it draws a Friday congregation of diplomats, professionals, students and District residents. The much larger Friday gatherings, however, take place at the ADAMS Center on Sugarland Road in Sterling, Virginia (one of the largest American mosque networks, with multiple suburban branches), the Diyanet Center of America in Lanham, Maryland (a flagship Turkish-American mosque), and Dar Al-Hijrah in Falls Church. Masjid Muhammad on 4th Street NW serves the historic African American Muslim community of the District. Khutbas are typically delivered in English with Arabic recitation; Friday prayer usually begins between 13:00 and 14:30 across the DC region.

Prayer times differ between cities because they are calculated from the apparent position of the sun, which depends on a city's latitude, longitude and the date. Washington DC sits at 38.9°N, 77°W in the America/New_York time zone, far enough north of the equator to feel a clear seasonal swing in day length and twilight duration. Two cities at very different latitudes — say Washington at 38.9°N and Houston at 29.8°N — see twilight unfold over different durations, so Fajr, Maghrib and Isha can sit a meaningful interval apart between them, particularly around the June and December solstices. Even cities at similar latitudes diverge if they fall in different time zones or follow different calculation conventions, such as ISNA's 15-degree depression versus the MWL 18-degree standard common in many international apps.