Sant Jordi is the Catalan equivalent to Valentine's Day. The tradition marks that men give women roses and women give men books, or viceversa! It doesn't matter. Each year, the streets around Catalonia are filled with people strolling around grasping books and roses. This year due to #covid_19 we'll have to celebrate Sant Jordi from home and sent digital "confined roses and books" instead.
The concept came from the Beauty and the Beast Rose, that is confined inside the glass.