Auckland Anniversary Day is a public holiday observed in the northern half of the North Island of New Zealand, being the area's provincial anniversary day. It is observed throughout the historic Auckland Province, even though the provinces of New Zealand were abolished in 1876. The modern area of observation consists of all of the Northland (where it is known as Northland Day), Auckland, Waikato, Bay of Plenty and Gisborne regions, as well as some parts of the Manawatū-Whanganui and Hawke's Bay regions north of the 39th parallel.The holiday falls on the Monday closest to 29 January, the anniversary of the arrival of William Hobson, later the first Governor of New Zealand, in the country in 1840.