Iranians celebrate the birth anniversary of Omar Khayyam Neyshaburi (1048-1131) on May 18, which is the national day of the Persian mathematician, astronomer, and poet.

The day begins with the casting of flowers on Khayyam's grave and the ringing of school bells in the Neyshabur. Numerous world literati and experts on Persian literature and Iranian scholars commemorate Omar Khayyam in ceremonies, exhibitions and conferences.








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