Since the late 20th century, the Kythirean economy has largely focused and, in the process, has become dependent on tourism, which provides the majority of the island's income, despite the fact that Kythira is not one of the most popular tourist destinations in Greece. The popular season usually begins with the Greek holiday of Pentecost at the end of May, and lasts until the middle of September. During this time, primarily during August, the island's population will often triple due to the tourists and natives returning for vacation. Dependence on tourism has resulted in increased building activity in many of the island's villages, mostly for commercial purposes (hotels and hospitality facilities, shops etc.), but also secondary homes; prominent examples are Agia Pelagia and Livadi, both of which having witnessed significant growth in their size since the early 1990s.