Koh Phangan is an island in the Gulf of Thailand in Surat Thani Province, just north of Koh Samui. It is renowned for its monthly Full Moon Party. This boisterous night-long celebration, which is tied to the lunar calendar, draws revelers to its southeastern peninsula, Haad Rin. Most festivities center on Sunrise Beach, whose beach bungalows attract a backpacker crowd. On the east and north coast lie quieter white-sand beaches including Hat Khuat and Hat Thian, and some select luxury resorts.