On Friday 03 October 2025, Her Excellency the Honourable Ms Sam Mostyn AC travelled from Canberra, Australian Capital Territory to Sydney, New South Wales.

Then, the Governor-General, as Patron, hosted an International Day of the Girl event for Plan Australia International.

In the afternoon, the Governor-General, as guest of Ms Romilly Madew AO FTSE, Chief Executive Officer, Engineers Australia, attended an Honorary Doctorate Ceremony at the University of Sydney.