At Government House, Canberra, the Governor-General, as Chancellor of the Order of Australia, hosted investiture ceremonies.

On Thursday 17 September 2015, at Government House, Canberra, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd) presided over a meeting of the Federal Executive Council.

Afterwards, the Governor-General, as Presiding Officer, hosted a citizenship ceremony in recognition of Australian Citizenship Day.

Later, at Parliament House, the Governor-General and Lady Cosgrove, as guests of the Co-Founder and Director, National Student Leadership Forum, Mr Jock Cameron and Director, Mr James Blackwood, attended a welcome dinner.

On Thursday 17 September 2015, at Government House, Canberra, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd) presided over a meeting of the Federal Executive Council.

Afterwards, the Governor-General, as Presiding Officer, hosted a citizenship ceremony in recognition of Australian Citizenship Day.

Later, at Parliament House, the Governor-General and Lady Cosgrove, as guests of the Co-Founder and Director, National Student Leadership Forum, Mr Jock Cameron and Director, Mr James Blackwood, attended a welcome dinner.

On Wednesday 16 September 2015, at Government House, Canberra, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd) received the High Commissioner for the Republic of Mozambique, His Excellency Mr Belmiro Malate.

On Tuesday 15 September 2015, at Government House, Canberra, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd), received the resignation of the Honourable Tony Abbott MP as Prime Minister.

Afterwards, the Governor-General and Lady Cosgrove attended a ceremony at which the Governor-General issued the Instrument of Appointment and Oath of Office to the newly appointed Prime Minister, the Honourable Malcolm Turnbull MP.

Afterwards, the Governor-General received the former Prime Minister, the Honourable Tony Abbott MP.

At Government House, the Governor-General and Lady Cosgrove attended a ceremony at which the Governor-General issued the Instrument of Appointment and Oath of Office to the newly appointed Prime Minister, the Honourable Malcolm Turnbull MP.

At the Australian War Memorial, the Governor-General, as guest of the High Commissioner for the United Kingdom, Her Excellency Mrs Menna Rawlings CMG, attended a reception to commemorate the 75th anniversary of the Battle of Britain.

On Monday 14 September 2015, at Government House, Canberra, Lady Cosgrove, accompanied by the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd) hosted a morning tea and a garden tour for the Parliamentary Partners Association.

Afterwards, at the Embassy of the United States of America, Yarralumla, Lady Cosgrove, accompanied by the Governor-General, as guests of the Ambassador, His Excellency Mr John Berry planted an “Eleanor Roosevelt” oak sapling and attended a barbecue lunch with Embassy staff.

At the Embassy of the United States of America, Yarralumla, Lady Cosgrove, accompanied by the Governor-General, as guests of the Ambassador, His Excellency Mr John Berry planted an “Eleanor Roosevelt” oak sapling and attended a barbeque lunch with Embassy staff.

On Sunday 13 September 2015, at Wallendbeen, New South Wales, the Governor-General, General the Honourable Sir Peter Cosgrove AK MC (Retd) and Lady Cosgrove, as guests of the Chairman of the Wallendbeen Kangaroo March Committee, Mr David Jacobs and the President of the Kangaroo March Centenary Re-Enactment Association, Mr Graham Brown attended the Kangaroo Recruitment Centenary March Re-enactment Celebrations.