{mosmap width='700'|height='500'|lat='-20.23868'|lon='148.98148'| zoom='11'|zoomType='Large'|zoomNew='0'|mapType='Satellite'|showMaptype='1'| overview='0'|text='Whitsunday Island'|tooltip='Whitsunday Island'|marker='1'| align='center'}

Derived from the naming of Whitsunday Passage by Lieutenant James Cook RN (1728-1779) navigator, HM Bark Endeavour, 4 June 1770, celebrated as religious festival Whitsun. Refer J.C. Beaglehole. The voyage of the Endeavour 1768-1771. Cambridge (UK), 1968, p.337. Name first appeared on Admiralty chart BA347 1863.