The Labour Day public holiday is a day celebrating the eight-hour work day.
The eight-hour work day was a long time coming - a working day could be up to 16 hours a day and six days a week. Sydney stone masons won the first eight-hour day in the State in 1855 and celebrated with a victory dinner on 1 October. It wasn't until 1916 that it came into effect across all industries.
On Monday 4 October 1915, with Australia in the midst of war, Sydney-siders took to the streets in holiday mode. Newspapers described the day as being an "unclouded dome of blue" under which 90 trade and industry unions, about 250,000 people, marched through the streets.
This moving image (from NRS 20499) shows some of the crowds watching the processions in George St Sydney. In the background you can see St Andrews Cathedral, the Town Hall and huge crowds watching the eight-hour day procession passing up park street in from of the Queen Victoria building