Complex sentence: The first gay pride of Crete was held on 26--27 June 2015 in Heraklion, becoming the island's first "Festival for Gender and Sexuality Liberation Visibility".
Split into simpler sentences: The first gay pride of Crete is to be held on 26--27 June 2015 in Heraklion. It will be the island's first "Festival for Gender and Sexuality Liberation Visibility".