In Western Australia, the governor proclaims the holiday either at the end of September or the beginning of October each year because the June public holiday is relegated to Western Australia Day (formerly Foundation Day). In South Australia, the Queen’s Birthday holiday is also called Volunteer’s Day. Many New Zealanders celebrate the Queen's Birthday on the first Monday of June each year, as New Zealand is a constitutional monarchy with the Queen of the United Kingdom being the head of state. Many people have the day off on the Queen’s birthday, which is the official opening of the ski season. It’s usually held on a Monday so is part of a long weekend.