Kayhan Kalhor's Birthday (composer and musician), Azar 3. Kayhan Kalhor is regarded as one of the leading figures in Iranian music, recognized for his skill with the kamancheh and his achievements as a composer. He has played a key role in bringing traditional Iranian music to global audiences and has participated in numerous international collaborations. His work has introduced new dimensions to Iranian music and attracted the interest of many enthusiasts and researchers. In 2019, Kayhan Kalhor's birthday was officially added to the Jalali calendar for the first time; this designation was made to honor his artistic contributions and his influence on contemporary Iranian music. Cultural and artistic organizations marked this day as an opportunity to acknowledge his role in elevating the status of Iranian music. On this date, music enthusiasts and researchers revisit Kalhor's works, and some cultural events are held to commemorate his birthday. His contributions to both fusion and traditional music continue to be recognized, and his birthday remains a symbol of the impact of contemporary Iranian artists in the calendar.