I used a combination of sources to gather this information, including historical records, official websites of museums and libraries, and general knowledge databases. Some specific sources include:

1. The official websites of the Australian National Maritime Museum (www.anmm.gov.au), the State Library of New South Wales (www.sl.nsw.gov.au), and the Museum of Sydney (www.museumofsydney.com.au).
2. The Australian Government's Department of Infrastructure, Transport, Regional Development, and Communications website (www.infrastructure.gov.au) for information on the Sydney Harbour Bridge.
3. The Sydney Opera House official website (www.sydneyoperahouse.com) for details about the venue.
4. General knowledge databases and historical archives for specific dates and events.

It's essential to note that while I tried to provide accurate information, some details might be subject to variations or inconsistencies in historical records. For the most accurate and up-to-date information, it's always best to consult primary sources or refer to expert historians.