Australia Day is not invasion day.

Arrival..... The Fleet arrived between 18 and 20 January 1788, but it was immediately apparent that Botany Bay was unsuitable. On 21 January Phillip and a few officers travelled to Port Jackson, 12 kilometres (7.5 mi) to the north, to see if it would be a better location for a settlement. They stayed there until 23 January; Phillip named the site of their landing Sydney Cove, after the Home Secretary, Thomas Townshend, 1st Viscount Sydney. They also made contact with the local Aboriginal people. They returned to Botany Bay on the evening of 23 January, Phillip gave orders to move the fleet to Sydney Cove the next morning, 24 January. That day there was a huge gale blowing making it impossible to leave Botany Bay. It was decided to wait till the next day - 25 January. During 24 January they spotted the ships Astrolabe and Boussole, flying the French flag, at the entrance to Botany Bay; they were having as much trouble getting into the bay as the First Fleet was having getting out. On 25 January the gale was still blowing; the fleet tried to leave Botany Bay but only HMS Supply made it out, carrying Arthur Phillip, Philip Gidley King, some marines and about 40 convicts. They anchored in Sydney Cove in that afternoon. Meanwhile, back at Botany Bay, Captain John Hunter of HMS Sirius made contact with the French ships and he and the commander, Captain de Clonard, exchanged greetings. Clonard advised Hunter that the fleet commander was Jean-François de Galaup, comte de La Pérouse. Sirius successfully cleared Botany Bay but the other ships were in great difficulty. Charlotte was blown dangerously close to rocks; Friendship and Prince of Wales became entangled both ships losing booms or sails; Charlotte and the Friendship actually collided; and Lady Penrhyn nearly ran aground. Despite these difficulties, all the remaining ships finally managed to clear Botany Bay and sail to Sydney Cove on 26 January. The last ship anchored there at about 3 pm. So it was on 26 January that a landing was made at Sydney Cove and clearing of the ground for an encampment immediately began. Then quoting directly from Phillip's account: " In the evening of the 26th the colours were displayed on shore and the Governor with several of his principal officers and others, assembled round the flag-staff, drank the king's health, and success to the settlement, with all that display of form which on such occasions is esteemed propitious, because it enlivens the spirits, and fills the imagination with pleasing presages. " — The Voyage of Governor Phillip to Botany Bay. The formal establishment of the Colony of New South Wales did not however occur on 26 January as is commonly assumed. It did not occur until 7 February 1788, when the formal proclamation of the colony and of Arthur Phillip's governorship were read out. The vesting of all land in the reigning monarch King George III also dates from 7 February 1788.

the French would not have permitted any resistance to settlement. They had built a redoubt ( a small fort) and the day after the First Fleet left them in Botany Bay they shot 20 of the friendly Eora tribe who Gov Phillip had befriended. history would have ben VERY different. As the English had beaten them to the land, the left in March. gov Phillip had heard the French were seeking lands to expand. It why they sent a group to settle Norfolk Island so quickly- It's all recorded in the First Fleet Diaries and other Official documents. https://www.sl.nsw.gov.au/research-and-collections/significant-collections/first-fleet-collection/journals-first-fleet