While the rest of the country sits back and relaxes this Australia Day, more than 100 surfers will try to ride the same wave along the NSW coast to for a new world record.
The group wants to break the Guinness World Record of 110 people, set by surfers in 2009 at Cape Town in South Africa.
Their bid for having the largest number of surfers ride a single wave will take place on Sunday at North Broulee beach on the NSW south coast.
Meanwhile, Australia Day celebrations in Sydney are being billed as the biggest since the bicentenary, with more than 14 hours of entertainment planned.
Some of the country's most popular artists will perform at free shows in the Harbour Concert Series as a tribute to Australian music.
X-Factor star Dami Im, Jessica Mauboy, Justice Crew, and the Wiggles will all take to the stage at Blues Point, while Mahalia Barnes and The Voice singer Prinnie Stevens will perform atop a floating stage at Darling Harbour.
Vessels of all shapes and sizes are also expected to take part in the first Tinnie Muster at Athol Bay, while a Tinnie Challenge will test boaties' manoeuvring, rope handling and joke-telling abilities.
Away from the water, wheelchair road racing Paralympian Kurt Fearnley is attempting his 10th Australia Day 10km marathon in the Rocks, with British Paralympian David Weir in pursuit.
Fearnley claimed bronze behind Weir's gold medal during the London Paralympics, but out-raced the Brit to victory during last year's London Marathon.
To cap off a big day celebrating Australia across the city, a fireworks spectacular is set to explode at Cockle Bay in Darling Harbour from 8.45pm (AEDT).