More than 4000 people from 150 cultural and community groups will march through Adelaide in the centrepiece of the city's Australia Day celebrations.
The march from Victoria Square to Elder Park on Sunday evening is expected to draw a crowd of about 40,000.
Most will then stay on for the concert and traditional fireworks display.
Lord Mayor Sandy Verschoor says the parade and concert celebrate Australia's diversity, the successful mix of cultures and the unity of community spirit.
"The huge gathering of families in Tarntanya (Elder Park) unites us all in a common bond of pride in what it means to be an Australian," she said.
Other activities on Australia Day include an early morning indigenous smoking ceremony with a welcome to country led by Uncle Fred Agius and Uncle Major "Moogy" Sumner.
The Tandanya National Aboriginal Cultural Institute will also host a "survival day" event with free entertainment, presentations and workshops.
"Survival day embodies the reality that Indigenous cultures are strong, with much to be positive about despite the negative effects of colonisation," the institute said.
Australian Associated Press