Colony of New South Wales
On 18 January 1788, the First Fleet led by Captain Arthur Phillip founded the first British settlement in Australian history as a penal colony. Having set sail on 13 May 1787, Captain Arthur Phillip assumed the role of governor of the settlement upon arrival, until 1792. 18 January 1788, the first ship of the First Fleet, with Phillip aboard, reached Botany Bay. Botany Bay found unsuitable by Phillip. After Phillip led exploration of Port Jackson, he, on the first ship, sailed and reached Sydney Cove on night of 25 January 1788. On morning of 26 January, men on board this ship went ashore and started clearing land for a camp. In the afternoon-evening, they erected a flag pole, raised the Union Jack, and the officers ashore made toasts to the Royal Family and the success of the colony. Likely, some, or all, ships of the First Fleet were present for the flag raising. On the morning of 27 January, all the fit male convicts, marines, and likely some ships' crew went ashore to establish the camp and find food, especially that having what today we call vitamin C. The female convicts came ashore on 6 February 1788 and likely officers wives and children if any. About mid-day 7 February 1788, the convicts, marines and others who were staying, were gathered by the Governor for the reading of the proclamation of New South Wales and a long reading of the rights of the convicts and others. Colony of NSW founded 7 February 1788. Before that, British naval administration applied.
First Fleet
On 26 January 1788, the Fleet weighed anchor and sailed to Port Jackson. The site selected for the anchorage had deep water close to the shore, was sheltered, and had a small stream flowing into it. Phillip named it Sydney Cove, after Lord Sydney the British Home Secretary. This date is celebrated as Australia Day, marking the beginning of British settlement. The British flag was planted and formal possession taken. This was done by Phillip and some officers and marines from the "Supply", with the remainder of "Supply"s crew and the convicts observing from on board ship. The remaining ships of the Fleet did not arrive at Sydney Cove until later that day.