Holidays and celebrations in Australia in 2021
January
February
- World Hijab Day
- World Wetlands Day
- World Cancer Day
- International Day of the Dentist
- World Day of the Sick
- Red Hand Day
- Darwin Day
- World Radio Day
- Valentine's Day
- Singles Awareness Day
- World Day of Social Justice
- International Mother Language Day
- International Tour Guide Day
- World Thinking Day
- Beautiful Birthday Festival
March
- World Immunity Day
- World compliment day
- Self-Aggression Awareness Day
- Zero Discrimination Day
- World Teen Mental Wellness Day
- Day of Fyodor Tiron and Maremyana Kikimora
- Match day
- World Wildlife Day
- World Hearing Day
- World Day of the writer
- International Irish Whiskey Day
- International HPV Awareness Day
- World Engineering Day for Sustainable Development
- World Obesity Day
- International Day for Awareness on Disarmament and Non-Proliferation
- World Glaucoma Day
- World DJ Day
- International Bagpipe Day
- International Wig Day
- International Day of Women Judges
- Dietitian's Day
- Mario Day
- International Day of Awesomeness
- World Plumbing Day
- World Day of Muslim Culture, Peace, Dialogue and Cinema
- World day against cyber censorship
- World Glaucoma Day
- World Day Against Cyber Censorship
- International Riesling Day
- Intrauterine Growth Restriction Awareness Day
- International Mathematics Day
- Day of Action for Rivers, Water and Life
- Steak and Blowjob Day
- Pi Day
- World contact day
- Saint Patrick's Day
- Sheelah's Day
- International Day of Happiness
- Earth Day
- UN French Language Day
- International Day of Forests
- World Down Syndrome Day
- International Day for the Elimination of Racial Discrimination
- World Poetry Day
- World Puppetry Day
- Harmony Day
- World Water Day
- World Meteorological Day
- World Tuberculosis Day
- International Day of Remembrance of the Victims of Slavery and the Transatlantic Slave Trade
- World Theatre Day
- National Doctors Day
- World Backup Day
April
- Edible book day
- April Fools' Day
- Birthday instant coffee
- International day of fun at work
- World Autism Awareness Day
- Reconciliation Day
- International Children's Book Day
- International Fact-Checking Day
- World Party Day
- World Aquatic Animal Day
- Barcode birthday
- Mobile phone birthday
- International Day for Mine Awareness and Assistance in Mine Action
- Webmaster Day
- International Carrot Day
- Vitamin c day
- International Day of Conscience
- International Day of Sport for Development and Peace
- World Health Day
- International Safety Pin Day
- Submarine Day
- World Festival of Oatmeal
- World Quantum Day
- Universal Day of Culture
- World Voice Day
- World amateur radio day
- International Day For Monuments and Sites
- Volunteer Appreciation Day
- World day of orphans
- UN Chinese Language Day
- International Cannabis Day
- World Curlew Day
- World Creativity and Innovation Day
- Earth Day
- World Book Day
- World Book Day
- UN English Language Day
- UN Spanish Language Day
- Kapyong Day
- World Day for Laboratory Animals
- Kapyong Day
- Fashion Revolution Day
- Anzac Day
- World Malaria Day
- Martyrs' Day
- International Chernobyl Disaster Remembrance Day
- World Intellectual Property Day
- Workers’ Memorial Day
- International Jazz Day
May
- Global Love Day
- International Harry Potter Day
- Scurvy Awareness Day
- World Tuna Day
- Sun Day
- African World Heritage Day
- World Pulmonary Hypertension Day
- World Hand Hygiene Day
- International No Diet Day
- World AIDS Orphans Day
- World Red Cross and Red Crescent Day
- White Lotus Day
- Iris Day
- International Day of Argania
- International Nurses Day
- International Day of Families
- International Climate Protection Day
- The International Conscientious Objectors' Day
- International Day Against Homophobia, Biphobia and Transphobia
- World Telecommunication and Information Society Day
- World Baking Day
- International Museum Day
- National Marshmallow Day
- World Bee Day
- World Metrology Day
- World Traumatologist Day
- International Tea Day
- International Day for Biological Diversity
- World Goth Day
- World Turtle Day
- World Video Game Day
- Towel Day
- Geek Pride Day
- National Sorry Day
- Reconciliation DayACT
- Brunettes day
- Saint Augustine's Day
- International Day of United Nations Peacekeepers
- National Siblings Day
- World No Tobacco Day
June
- World Milk Day
- International Consultants Day
- International Day of Doubt
- Day of determination
- International Sex Workers’ Day
- Mabo Day
- Bicycle day
- World Environment Day
- Day of the Russian Language
- Queensland DayQueensland
- World Food Safety Day
- World Tourette Syndrome Awareness Day
- World Oceans Day
- World Brain Tumor Day
- International day of the housewife
- International Day of Archives
- World Art Nouveau Day
- World Craft Day
- World Prostate Cancer Day
- International day of indomitable passion
- World Day Against Child Labour
- World Knitting Day
- International Weblogger’s Day
- World Blood Donor Day
- Global Wind Day
- World Elder Abuse Awareness Day
- International Day of Family Remittances
- International Biotechnology Day
- International Day of Solidarity with the Struggling Peoples of South Africa
- National Vegemite Day
- World Crocodile Day
- World Garbage Man Day
- World Day to Combat Desertification and Drought
- Autistic Pride Day
- World Sickle Cell Day
- International Day for the Elimination of Sexual Violence in Conflict
- World Sauntering Day
- World refugee day
- International Day of Yoga
- Go Skateboarding Day
- World Humanist Day
- International Widows Day
- United Nations Public Service Day
- Olympic Day Run
- International Women in Engineering Day
- International Dravet Syndrome Awareness Day
- Swastika Rehabilitation Day
- World UFO Day
- World Anti-Bullfighting Day
- International Scoliosis Day
- World Refrigeration Day
- International Day Against Drug Abuse and Illicit Trafficking
- International Day of the Deafblind
- Tau Day
- International Body Piercing Day
- World Social Media Day
- International Day of Parliamentarism
- Asteroid Day
July
- International Joke Day
- Territory DayNorthern Territory
- World UFO Day
- Plastic Bag Free Day
- Cannes Film Festival
- World Fried Chicken Day
- World Cardiologist Day
- National Kissing Day
- World Chocolate Day
- Australian Constitution Day
- Constitution day
- World Population Day
- World Rock Day
- International Conductor's Day
- International Non-Binary People's Day
- World Youth Skills Day
- World Emoji Day
- Nelson Mandela International Day
- International Chess Day
- International Cake Day
- World Brain Day
- International Homework Day
- Pi Approximation Day
- International Strange Music Day
- World Drowning Prevention Day
- Esperanto Day
- World Day against Trafficking in Persons
- Friend's day
- African Women's Day
August
- World Scout Scarf Day
- World Day of Joy
- National Aboriginal and Torres Strait Islander Children’s Day
- International Day "Physicians of the World for Peace"
- Aged Care Employee Day
- International Rescue Cat Day
- International Cat Day
- International Mountaineering Day
- Happiness Happens Day
- International Day of the World's Indigenous Peoples
- World Elephant Day
- International Youth Day
- Sea Org Day
- International left-hander day
- World Rum Day
- Longtan Day
- World Humanitarian Day
- World Photography Day
- World Day of Laziness
- International Day for the Remembrance of the Slave Trade and its Abolition
- Chips birthday
- National Dog Day
- International Day against Nuclear Tests
- International Whale Shark Day
- International Day of the Disappeared
September
- Wattle Day
- World Letter Writing Day
- World Skyscraper Day
- Flag Day
- Opening New Doors Day
- International Day of Charity
- World War Toy Destruction Day
- International Day of Clean Air for blue skies
- National Threatened Species Day
- International Literacy Day
- Software Tester Day
- International Day of Gynecological Health
- World Suicide Prevention Day
- White Balloon Day
- United Nations Day for South-South Cooperation
- Mindfulness Day
- World Chocolate Day
- World Sepsis Day
- Tank Forces Day
- International Day of Democracy
- World Lymphoma Awareness Day
- International Free Money Day
- Day of Our Lady of the Seven Sorrows
- Birthday of the environmental organization Greenpeace
- International Day for the Preservation of the Ozone Layer
- World Patient Safety Day
- Australian Citizenship Day
- World Water Monitoring Day
- World Day of Remembrance for Dead Motorcyclists
- The birthday of the "Smiley"
- International Talk Like a Pirate Day
- World Gratitude Day
- Zero Emissions Day
- International Day of Peace
- Car-free days
- World Rhino Day
- Celebrate Bisexuality Day
- International Day of Sign Languages
- International Day of caravan
- System Analyst Day
- World Dream Day
- World Contraception Day
- World Tourism Day
- Google birthday
- World Rabies Day
- International Day for Universal Access to Information
- International Safe Abortion Day
- International Poke Day
- International Day of Awareness of Food Loss and Waste
- World Heart Day
- Day of autumn loneliness
- International Translation Day
- Blasphemy Day
October
- International Day of Older Persons
- World Vegetarian Day
- International Coffee Day
- International Music Day
- International Day of Non-Violence
- International Day of the Social Educator
- World Game Day
- World Day of Sobriety and the Fight against Alcoholism
- World Animal Day
- World Space Week
- International Day of No Prostitution
- World Space Week
- World Space Week
- World cotton day
- World Space Week
- World Space Week
- World Post Day
- World Space Week
- World Mental Health Day
- World Space Week
- International Day of the Girl Child
- Diver's Day
- International Day for Disaster Risk Reduction
- International Suit Up Day
- World Standards Day
- Pregnancy and Infant Loss Remembrance Day
- International Rural Women's Day
- Pregnancy and Infant Loss Remembrance Day
- World Food Day
- International Day for the Eradication of Poverty
- World Osteoporosis Day
- World Statistics Day
- International Air Traffic Controller Day
- International Stuttering Awareness Day
- Wombat Day
- Fechner Day
- iPod Day
- United Nations Day
- World Development Information Day
- International Day of Diplomats
- International Mother Earth Day
- International Animation Day
- World Stroke Day
- Halloween
November
- World Vegan Day
- All Saints' Day
- International Day to End Impunity for Crimes Against Journalists
- All Souls' Day
- Guy Fawkes Night
- International Inuit Day
- World Urbanism Day
- International Accounting Day
- Armistice Day
- Remembrance Day
- World Kindness Day
- World Diabetes Day
- International Day for Tolerance
- International Student's Day
- International Men's Day
- World Toilet Day
- World Television Day
- Son's day
- Day of Remembrance for All Victims of Chemical Warfare
- Computer Security Day
- Cities for Life Day
December
- World AIDS Day
- International Day for the Abolition of Slavery
- United Nations' International Day of Persons with Disabilities
- National Hugging Day
- International Volunteer Day
- International Volunteer Day for Economic and Social Development
- International Civil Aviation Day
- International Anti-Corruption Day
- Human Rights Day
- International Mountain Day
- Monkey Day
- Zamenhof Day
- International Day to End Violence Against Sex Workers
- International Migrants Day
- Arabic Language Day
- UN Arabic Language Day
- International Human Solidarity Day
- Francis Xavier Cabrini Day
- Christmas eve
- Christmas
- Boxing Day
- International Fans Day
- Saint Stephen's Day
- Synaxis of the Mother of God
- Proclamation DaySouth Australia
- Saint Sylvester's Day