The date is seared into the national consciousness as a point where the two nations emerged from the shadow of the British empire, and has become a solemn anniversary to remember troops from both countries who served and died in all wars.
If you are planning to take public transport to watch the Dawn Service or Anzac Day March in the CBD or surrounds here's what you need to know.
The Gallipoli campaign was the first major military action fought by the Australian and New Zealand Army Corps during World War I. Thousands attend commemoration services on the peninsula each year.
For photos of the Anzac Day 2018 Laidley Dawn Service, see the gallery below.
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At the Australian War Memorial in the capital Canberra, an estimated crowd of 38,000 - 10 per cent of the city's population - gathered in the cool autumn darkness for the dawn service which began with a lone soldier playing a didgeridoo.
Where is the Anzac Day dawn service and what's it all about?
Ceremonies will continue throughout the day with a wreath laying ceremony at 9am and a mid-morning service at 10am.
Tens of thousands of Turkish nationals and soldiers died, along with tens of thousands of Europeans, plus around 7,000-8,000 Australians and almost 3,000 New Zealanders, referred to together as Anzac troops.