On Thursday, Friday or Saturday you could visit the annual festival, which is well-known nationwide for the music, costumes and dance of the local people.

nationwide 是由名词 nation（国家）和形容词 wide（广泛的）组成的复合形容词，表示"全国范围的"或"遍及全国的"。nationwide 强调某事物在整个国家范围内都具有影响力或知名度。