Thursday Island, colloquially known as TI, or in the Kawrareg dialect, Waiben or Waibene, is an island of the Torres Strait Islands, an archipelago of at least 274 small islands in the Torres Strait. TI is located approximately 39 kilometres north of Cape York Peninsula in Far North Queensland, Australia.

Kalau Lagau Ya, Kalaw Lagaw Ya, Kala Lagaw Ya, or the Western Torres Strait language is the language indigenous to the central and western Torres Strait Islands, Queensland, Australia. On some islands, it has now largely been replaced by Torres Strait Creole.