Moros y Cristianos, literally means Moors and Christians, and is a set of festival activities which are celebrated in many towns and cities of Spain, according to popular tradition the festivals commemorate the battles, combats and fights between Moors (or Muslims) and Christians during the period known as Reconquista (from the 8th century through the 15th century).

The festivals represent the capture of the city by the Moors and the subsequent Christian reconquest. The people that take part in the festival are usually enlisted in filaes or comparsas (companies that represent the Christian or Moor legions), and for several days, they parade with bombastic costumes loosely inspired by Medieval fashion. Christians wear fur, metallic helmets, and armour, fire loud arquebuses, and ride horses. In contrast, Moors wear ancient Arab costumes, carry scimitars, and ride real camels or elephants. The festival develops among shots of gunpowder, medieval music, and fireworks, and ends with the Christians winning a simulated battle around a castle.

There are many other fiestas during the year. Apart from the national fiestas, many towns and villages have their own fiestas to celebrate local saints and events so you never know when you are going to stumble into one.

Other important fiestas around the Mojacar area include:

Saint Isidro's Day on the 15th of May

The Feast of San Juan on the 23rd of June

Saint Augustin's Day on the 28th of August

The Virgin of the Rosary Festival on the 7th of October.

A comprehensive list of the fiestas all around Spain can be found at this very well researched page.