The Old Parliament House, Canberra, Australia, officially opens.

Old Parliament House, formerly known as the Provisional Parliament House, was the seat of the Parliament of Australia from 1927 to 1988. The building began operation on 9 May 1927 after Parliament's relocation from Melbourne to the new capital, Canberra. In 1988, the Commonwealth Parliament transferred to the new Parliament House on Capital Hill. Since 2009, Old Parliament House has become a museum about the building and Australian democracy more broadly, named the Museum of Australian Democracy at Old Parliament House (MoAD). It also serves as a venue for temporary exhibitions, lectures and concerts.

May 9 is the 129th day of the year in the Gregorian calendar; 236 days remain until the end of the year.