August
21 International Day of Remembrance and Tribute to the Victims of Terrorism
22 International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief
23 International Day for the Remembrance of the Slave Trade and Its Abolition [UNESCO]
29 International Day against Nuclear Tests
30 International Day of the Victims of Enforced Disappearances
September
1 World Day of Prayer for the Care of Creation
2 1991: Council for Aboriginal Reconciliation Act passed by Parliament
3 Indigenous Literacy Day (check day)
4 Krishna Janmashtami | Hinduism
6 Father’s Day
7 National Threatened Species Day
7-13 National Child Protection Week (check day)
10 World Mental Health Day | World Suicide Prevention Day
10 R U OK? Day
11 Nayrouz (Coptic New Year)
12–13 Rosh Hashanah | Judaism Evening of Sat, 12 Sept 2026 – Sun, 13 Sept 2026
15 International Day of Democracy UN
15 Ganesh Chaturthi | Hinduism
16 International Day for the Preservations of the Ozone Layer UN
21 -22 Yom Kippur | Judaism Evening of Mon, 21 Sep – Tue, 22 Sep 2026
21 International Day of Peace UN
26 International Day for the Total Elimination of Nuclear Weapons UN
26 Sukkot | Judaism
27 World Day for Migrants & Refugees | Catholic (check)