Abd al-Rahman al-Jadiri
Encyclopedia
Abu Zayd Abd al-Rahman Mohammed al-Jadiri (born in Meknes
Meknes
Meknes is a city in northern Morocco, located from the capital Rabat and from Fes. It is served by the A2 expressway between those two cities and by the corresponding railway. Meknes was the capital of Morocco under the reign of Moulay Ismail , before it was relocated to Marrakech. The...

, in 1375 and died in Fez
Fes
Fes or Fez is the second largest city of Morocco, after Casablanca, with a population of approximately 1 million . It is the capital of the Fès-Boulemane region....

, probably in 1416) was muwaqqit (time-keeper) at the Qarawiyyin Mosque. He wrote a treatise on the determination of time of day and night, an urzija (verse composition) in 26 chapters and 335 verses, entitled Raudat al-azhar fl 'ilm waqt al-lail wal-nahar (1391/2) and a calendar adapted to the latitude of Fez
Fes
Fes or Fez is the second largest city of Morocco, after Casablanca, with a population of approximately 1 million . It is the capital of the Fès-Boulemane region....

Tanbllt al-afliím 'ala mii ya/:tduthu ji ayyiim al-'iim.
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