Australian Citizenship Day
Australian Citizenship Day is held on September 17. This event in the second decade of the month September is annual. 
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Australian Citizenship Day was first celebrated in 2001. The Australian Government established the day in 2001 in response to a recommendation by the Australian Citizenship Council in their 2000 report Australian Citizenship for a New Century.
Acquiring citizenship helps you stay indefinitely in Australia as well as to re-enter the country whenever you want. You also get the privilege of staying outside Australia as long as you wish to. An Australian citizen returning to the country does not have to stand in long queues at the immigration counter.
Similar holidays and events, festivals and interesting facts
National Threatened Species Day on September 7 (Australia);
National Coffee Day on September 29
International Day of No Prostitution on October 5 (IDNP is an awareness day that was first observed in 2002. Locations at which IDNP was observed in its inaugural year included the San Francisco Bay Area of California, United States and Melbourne, Victoria, Australia);
Labor Day in the Australian Capital Territory, New South Wales and South Australia on October 7 (is celebrated on the first Monday in October);
International Vet Nurse Day on October 11 (Held on the second Friday of October);
International Mastocytosis & Mast Cell Diseases Awareness Day on October 20
Wombat Day on October 22 (Australia)