what year is considered the beginning of islam
Islamic calendar The Islamic calendar employs the Hijri era whose epoch was retrospectively established as the Islamic New Year of AD 622. During that year, Muhammad and his followers migrated from Mecca to Yathrib (now Medina) and established the first Muslim community (ummah), an event commemorated as the Hijra. In the West, dates in this era are usually denoted AH (Latin: Anno Hegirae, "in the year of the Hijra") in parallel with the Christian (AD) and Jewish eras (AM). In Muslim countries, it is also sometimes denoted as H[1] from its Arabic form ( سَنة هِجْريّة, abbreviated هـ). In English, years prior to the Hijra are reckoned as BH ("Before the Hijra").[2]
Islam in South Asia Islam first came to the western coast of India when Arab traders as early as the 7th century AD came to coastal Malabar[23] and Konkan-Gujarat.[24] Cheraman Juma Masjid in Kerala is thought to be the first mosque in India, built in 629 AD by Malik ibn Dinar.[25][26][27][28][29][30] Following an expedition by the governor of Bahrain to Bharuch in the 7th century AD, immigrant Arab and Persian trading communities from South Arabia and the Persian Gulf began settling in coastal Gujarat.[31] After the Islamic conquest of Persia was completed, the Muslim Arabs then began to move towards the lands east of Persia and in 652 captured Herat.[32]