Islamic calendar: Did you mean...?

12th-century textile fragment from the Shrine of San Librada, Sigüenza Cathedral, Spain. The tapestry was likely taken from Almeria after King Alfonso VII of Castile captured the city. It features patterns that were popular...

The Ridda Wars or the Wars of Apostasy (632-633 CE) were a series of military engagements between the armies of the Rashidun Caliphate (632-661 CE) and the renegade tribes of Arabia. The rebels had renounced their allegiance with...

Uthman ibn Affan (l. 576/583-656 CE) was an early convert to Islam, a close friend and son-in-law of Prophet Muhammad (l. 570-632 CE), and the third caliph (r. 644-656 CE) of the Rashidun Caliphate (632-661 CE). His charitable acts and...

The Sun Stone (or The Calendar Stone), Aztec, reign of Moctezuma II (1502-20), discovered in 1790 at the southeastern edge of the Plaza Mayor (Zocalo) in Mexico City, stone (unfinished), 358 cm diameter...

Omar Khayyam (also given as Umar Khayyam, l. 1048-1131 CE) was a Persian polymath, astronomer, mathematician, and philosopher but is best known in the West as a poet, the author of The Rubaiyat of Omar Khayyam. His famous work has...

Trace the rise and fall of the Islamic Empire, from the prophet Muhammad in the 7th century to the sacking of Baghdad. In the 7th century CE, the prophet Muhammad united...

The Tughlaq dynasty (also spelt Tughluq), ruled the Delhi sultanate from 1320 to 1413. Followed by the Khalji dynasty and preceded by the Sayyids, the Tughlaq dynasty formed an important period in the history and culture of the...

Under the Seljuk rule, Persia gained a period of economic and cultural prosperity. The innovative techniques of the Seljuk period and style in architecture and the arts had a strong influence...

The Babylonians developed a calendar based on the moon and sun cycles. The Lunar calendar was designed to work in conjunction with the solar cycle by adding leap months known an "intercalary" months.

The Iranian Revolution (1978-1979) was the social movement that arose from widespread and diverse discontent with the monarchic government of Iran. The revolution was fought against the regime of Mohammad Reza Shah (r. 1941-1979...