Complex sentence: They have their specific costumes which usually represent a particular country (England, Germany, Romania, etc.) Recently the parade is pushed back to days before the festival proper, thus this Children's Tamborrada is the first activity of the festival.
Split into simpler sentences: They have their specific costumes which usually represent a particular country (such as England, Germany, or Romania). More recently, the parade has been pushed back to days before the festival proper, thus this Children's Tamborrada is the first activity of the festival.