Held on the 25th of April, Anzac Day was first created to honour those who fought at Gallipoli during World War One.
The date refers to the day in 1915 when the Australian and New Zealand Army Corps landed in the Gallipoli Peninsula.
Brian Dawson, from the Australian War Memorial, explains that nowadays, the commemoration is for all veterans.
The day starts with a ceremony open to the public called Dawn Service.
The Dawn Service is followed by a Gunfire Breakfast, a simple barbeque with sausages, bread rolls, eggs and sometimes, coffee washed down with rum.
Later in the morning, veterans’ marches are held all over the country.
In Canberra, the commemorations are held at the Australian War Memorial.
In Sydney, it's at The Cenotaph in Martin Place and in Melbourne, at the Shrine of Remembrance.
Each capital city has major events organised.
In smaller cities and villages, Brian Dawson says you can find more information at your local RSL.
If you're interested in learning more about Anzac Day, Brian Dawson recommends visiting the Australian War Memorial website.
You can find the National Archives of Australia website at naa.gov.au and the Australian War Memorial website at awm.gov.au.
You can also visit the Australian War Memorial in Canberra, where some of the exhibitions are translated into several languages.