* Historical Significance: Queen Elizabeth II was the monarch of Australia for many years, and her birthday is a way to commemorate her reign and the role of the monarchy in Australian history.
* Cultural Tradition: Public holidays are often rooted in cultural traditions and are a way for people to come together and celebrate.
* Tourism and Economy: Long weekends provide opportunities for people to travel and spend money, which can benefit the economy.
However, the actual date of the Queen's Birthday public holiday can vary across different states and territories in Australia, as it's not always celebrated on the Queen's actual birthday.
It's important to note that the Queen's Birthday is no longer celebrated in the UK since the passing of Queen Elizabeth II. The holiday was replaced with a new public holiday, The King's Birthday, in honor of King Charles III.