Horse races are held every Sunday, all the year round, at the tracks (Hipodrom) at Son Pardo near Palma, and near Mahon and Ciutadella.
Horse races are also run on Fridays. 
mnli hypothesis: Horse races are also run on Fridays.  premise: Horse races are held every Sunday, all the year round, at the tracks (Hipodrom) at Son Pardo near Palma, and near Mahon and Ciutadella.