Abu Zayd Abd al-Rahman Mohammed al-Jadiri () (born in Meknes, in 1375 and died in Fez, probably in 1416) was the (time-keeper) at the Qarawiyyin Mosque.
He wrote a treatise on the determination of time of day and night, an (verse composition) in 26 chapters and 335 verses, entitled (1391/2), and a calendar adapted to the latitude of Fez, .Samso, J. "An Outline of the History of Maghribi Zijes from the End of the Thirteenth Century", in: Journal for the History of Astronomy, p.94
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