The story
Samarkand Registan Music Nights in Samarkand/Registan
This listing most closely matches Sharq Taronalari, or Melodies of the East, a UNESCO-recognized international music festival held every two years in Samarkand's Registan Square since 1997, and is likely a descriptive rename of that well-established biennial event rather than a separate festival.
Registan Square has stood at the heart of Samarkand since the fifteenth century, when Ulugbek built the first of its three madrassas as a center of learning, later joined by the Sherdor and Tillya Qari madrassas to form the ensemble that still frames the square today.