The clock starts on 26 January 1788. That’s when the First Fleet — 11 British ships carrying ~1,400 people (775 convicts, plus marines, officers, and families) — anchored in Botany Bay, then moved to Port Jackson (Sydney Cove).
The colony’s original charter covered the entire eastern half of the continent — modern NSW, Queensland, Victoria, Tasmania, ACT, NT. Western Australia stayed separate until 1829.
Aboriginal peoples had inhabited Australia for 65,000+ years. The arrival began a catastrophic disruption: disease, dispossession, frontier violence. January 26 is now “Invasion Day” / “Survival Day” for many First Nations Australians.
1788 wasn’t a beginning — it was a collision.