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• World Science Day for Peace and Development, 10 November

• World Cities Day 31 October

• United Nations Day 24 October

• World Mental Health Day

• World Post Day 9 October

• International Day for the Total Elimination of Nuclear Weapons | 26 September

• International Day of Peace 21 September

• International Day for South-South Cooperation, 12 September

• International Day to Protect Education from Attack, 9 September

• International Day of Clean Air for blue skies 7 September

• International Day of Charity 5 September

• International Day against Nuclear Tests 29 August

• International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief | 22 August

• International Day of Remembrance and Tribute to the Victims of Terrorism 21 August

• International Youth Day 12 August

• International Day of the World's Indigenous Peoples 9 August

• World Breastfeeding Week 2021

• World Drowning Prevention Day 25 July

• World Youth Skills Day 15 July

• World Population Day 11 July

• International Day in Support of Victims of Torture, 26 June