To whom it might concern:
In May (Second week) you can attend the fiesta "Sa Fira" and "Es Firó". Traditional fiestas in Soller and Puerto de Soller to remembering the battle between the Moors and Christians.
May 17 the square of Soller will host "La feria de la naranja de Soller". The local orange business will have stands in which they will offer products to the visitors.
Wish I could have been there!