Day has been a Junior Research Fellow at Clare College in Cambridge, founding head of History and Political Science at Bond University, official historian of the Australian Customs Service, Keith Cameron Professor of Australian History at University College Dublin, and Professor of Australian Studies at the University of Tokyo.
Day has been a Junior Research Fellow at Clare College in Cambridge, founding head of History and Political Science at Bond University, official historian of the Australian Customs Service, Keith Cameron Professor of Australian History at University College Dublin, and Professor of Japanese Studies at the University of Tokyo.