Salah times in Washington.

Washington, D.C., the capital of the United States, is home to a metropolitan population of around 6.3 million across the District of Columbia and surrounding Maryland and Virginia suburbs, with an estimated Muslim population of around 80,000–100,000 across the wider region. The community is particularly diverse, including African-American Muslims, Arab, South Asian, Iranian, West African, and Southeast Asian heritages, and gains additional weight from the city's role as host to embassies and international organisations. The Islamic Center of Washington on Massachusetts Avenue, opened in 1957 with a 49-metre minaret aligned to face Mecca, was the largest mosque in the Western Hemisphere when it was built and remains the oldest in the metropolitan area; the much larger Diyanet Center of America in Lanham, Maryland, completed in 2016 in classical Ottoman style with funding from the Turkish religious affairs presidency, is now one of the largest mosques in North America. Most published prayer times in the DC area follow either the ISNA or Muslim World League method. The city is on Eastern Time (UTC-5, UTC-4 with daylight saving) and at 39° north sees marked seasonal shift in Fajr and Isha times.