National Khayyam Day
May 18 is observed as National Khayyam Day. Born on May 18, 1048 in Nishapur, 2019 marks Khayyam's 971st birthday. Omar Khayyam was a Persian mathematician, astronomer, and poet in the 11th and 12th centuries notable for his contributions to geometry and designing the Jalali calendar. As a poet, Khayyam [...]