On Monday, 4 August 2025, Her Excellency the Honourable Ms Sam Mostyn AC, as guest of Dr Tan Puay Yok, Executive Director, National Parks Board Singapore, attended an Orchard Naming Ceremony and tour of Singapore Botanic Gardens.

Then, the Governor-General, as guest of President Tharman Shanmugaratnam, attended a Welcome Ceremony. 

Afterwards, the Governor-General attended a meeting with President Tharman Shanmugaratnam. 

Later, the Governor-General, attended a meeting with Prime Minister Lawrence Wong.

In the afternoon, the Governor-General, as guest of Mr Roel Faes Chairman, and Mr Gasper Tan, Chief Executive Officer, visited and attended a lunch with the Samaritans of Singapore. 

Later, the Governor-General, as guest of Professor Tan Chorh Chuan, Chairman, A*STAR, visited the A*STAR Advanced Remanufacturing and Technology Centre. 

In the evening, the Governor-General, as guest of President Tharman Shanmugaratnam, attended a State Banquet.