Sónar is a three-day electronic and advanced music festival. It was founded in Barcelona in 1994 by Ricard Robles, Enric Palau, and Sergi Caballero. The festival has been divided into two parts since its inception: Sónar by Day and Sónar by Night.
https://sonar.es/
Mobile World Congress is the world’s largest gathering for the mobile industry, organised by the GSMA, & held in the Mobile World Capital Barcelona, 22-25 February 2016.