Australia Day is celebrated on January 26th to commemorate the arrival of the First Fleet at Port Jackson in 1788, led by Captain Arthur Phillip. It was originally called Anniversary Day, Day of Mourning, or Foundation Day between 1818 and 1970. Australia Day did not become a public holiday until 20 years after it was first celebrated. Captain Arthur Phillip was buried at St Nicholas Church after his wife Margaret died in 1792 and he married Isabella Whitehead.